According to valence bond theory, 2s and 2p orbital of carbon atom will be formed pi bonding.
One of it's two fundamental theories created to use quantum mechanics to describe chemical bonding would be the valence bond theory, and molecular orbital theory.
Eight valence electrons should be used to generate two double bonds in the CS2 molecule. As a result, it uses up eight of the 16 valence electrons. These valence electrons are located in the carbon atom's 2s and 2p orbitals, where they join to create a double bond.
Therefore, according to valence bond theory, 2s and 2p orbital of carbon atom will be formed pi bonding.
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Calculate the mass of 0.5 more of Sodium chloride [Na = 25, CL = 35.5].
The mass of an additional 0.5% sodium chloride is 2.93×10^23
What is sodium chloride used for?As an electrolyte replenisher, sodium chloride is used to assist reduce heat cramps brought on by excessive sweating. This drug is also used to make a standard isotonic sodium chloride solution. The chemical formula for the ionic compound sodium chloride, often known as salt, is NaCl, which represents a 1:1 ratio of the ions sodium and chloride. 39.34 g Na and 60.66 g Cl have molar weights of 22.99 and 35.45 g/mol in 100 g of NaCl, respectively. To replace salt and water that have been lost from your body as a result of specific conditions, sodium chloride 23.4% injection is employed (eg, hyponatremia or low salt syndrome). Additionally, it is added to IV fluids that contain carbohydrates and total parenteral nutrition (TPN).
Is sodium chloride harmful to the body?In vulnerable individuals, a high-NaCl diet can increase blood pressure and result in premature mortality. In hypertension, a high-NaCl diet can significantly increase mortality even while it does not further raise blood pressure, in part due to numerous tiny brain infarcts, according to recent research. Salt, commonly known as sodium chloride (NaCl), is a crucial substance that our body uses to transport and absorb nutrients. keep blood pressure steady. maintain the proper fluid equilibrium.
Molecular formula of NaCl is 58.5
58.5gof NaCl=6.023×10^23
28.5g of NaCl= 6.023×10^23÷58.5×28.5
= 2.93×10^23
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Can someone help me with these. They’re about earths water. Ik this isn’t chemistry but I couldn’t find anything with just science.
75% of the surface of the world is covered by water, yet only a small portion of that water, 97% of it being in the oceans, is suitable for use by people, animals, or plants since it is too salty.
What is fresh water?Freshwater is defined as water with less than 1,000 milligrams of dissolved particles per liter, most frequently salt. Earth's surface water bodies are often seen as renewable resources because they are a part of the water cycle, despite the fact that they rely heavily on other water cycle components.
What is water that is fresh?Freshwater is defined as water with less than 1,000 milligrams of dissolved particles per liter, most frequently salt. Earth's surface water bodies are involved in the water cycle.
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List and explain four properties of plastics. Give one use of plastics linked to each other of these properties
Answer:
1.) plastics are poor conductors of heat and electricity
2.) plastics are non reactive metals they are not attacked by chemicals
3.) plastics are lightweight strong and durable
4.) plastics can be moulded and dyed easily in many colours like orange, pink ,sky blue , red, green, and e.t.c
the four uses of plastics are:
1.) bakelite is used to make electric switches insulating casings and handle of cookware and tools
2.) melamine is heat resistant and is used to make kitchenware , floor tiles and special suits for firefighters
3.) Teflon is used as a non stick coating on cookware as both water and oil do not stick to it
4.) many plastics are waterproof and therefore
they are used to make Water bottles and waterproof containers
Explanation:
Search it up bro :')
The four properties of plastics are malleability, longevity, cheapness, and poor conductivity.
Plastics are generally very malleable and can be molded into different shapes very easily. Different types of plastics have different melting points, which enables them to be shaped into different shapes and make objects.
Plastics are generally very durable and have a long shelf life. That is the reason why plastics are used to make things that go through a lot of wear and tear. A negative aspect of this is that plastics, when exposed to natural processes of degradation, do not break down easily and harm the environment.
Plastics are usually cheap and can be obtained at a very less price. This helps people afford goods made out of plastic and also reduces the production cost of the goods.
Plastics are generally very poor conductors of heat and electricity. This means that they do not conduct heat and electricity very well, which is why they are used as insulators and wire coverings.
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Laser pointed at a black paper is what type of energy dispersion, transmitted or opaque?
Dispersion types include chromatic, material, waveguide, and polarisation mode dispersion.
What is dispersion in the transmitted optical signal?The spreading out of a light pulse in time as it travels down the fibre is known as dispersion. Waveguide, material, and model dispersion are all types of dispersion in optical fibre. Below, each category is covered in more detail.White light dispersion occurs when white light passes through a glass prism and separates into its seven individual hues. The colours that are discernible include violet, indigo, blue, green, yellow, orange, and red.There are three types of dispersion in an optical medium, such fibre: chromatic, modal, and material. The emitter's spectral breadth causes chromatic dispersion. The number of various wavelengths that the LED or laser emits depends on its spectral width.To learn more about Dispersion refer to:
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. Calculating The half-life of iron-59 is 44.5 days.
After 133.5 days, 2.76 g of iron-59 remains.
What was the mass of the original sample?
-SOMONE JUST PLEASE HELPP ME IM LITERALLY STUCK!!
Answer: Just in case your still stuck, The half-life of iron-59 is 44.5 days, which means that half of the original sample will decay in that amount of time. After 133.5 days, 2.76 g of iron-59 remains. To find the original mass of the sample, we need to know how many half-lives have passed.
133.5 days / 44.5 days/half-life = 3 half-lives
After three half-lives, the remaining mass is 1/8 of the original mass. Therefore,
2.76 g * 8 = 22.08 g
The original mass of the sample was 22.08 grams.
Hope this helps you now or later on :)
what is the formula for magnetite?
Answer:Fe₃O₄
Explanation:It contains 3 molecules of Iron and 4 molecules of Oxygen and that makes Magnetite.
How many grams of water are produced if we react 3 moles of hydrogen with 3 moles of oxygen? 2 h2 (g) + o2 (g) + 2 h2o (g).
There would be 1.67 grams of water are produced if we react 3 moles of hydrogen with 3 moles of oxygen.
First we write the balanced reaction
2H₂ (g) + O₂ (g) → 2H₂O (l)
From the reaction we know that 2 moles of H₂ and 1 mole of O₂ produce 2 moles of 2H₂O. the limiting reactant is hydrogen, so we can use unitary method to calculate the moles of water produced
Moles of water= 2/2 x moles hydrogen
Moles of water = 2/2 x 3 moles = 3 moles
then we can calculate the mass of water produced
Mass water = mass/ mass molar
Mass water = 3 moles / 18 g/mol
mass water = 1.67 gram
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How can different types of light can change materials in different ways
Different types of light can change materials differently because some materials absorb light energy and some reflect light.
How does light interact with objects of different materials?When a light wave touches an object, they are either transmitted, reflected, absorbed, refracted, and diffracted, or depending on the material's makeup and the light energy's wavelength.
Usually, materials absorb a few colors of light and reflect others, to different extents, so that they get colored. Some materials will even absorb light of one color and emit light of another color, an effect called fluorescence.
so we can conclude that different materials absorb and reflect an image's light energy.
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When converting from moles to particles or moles to grams, you must...
A multiply
B subtract
C add
D divide
A. Multiply - When converting from moles to particles or moles to grams, you must multiply.
What is moles?Moles are small mammals that are found in many parts of the world. They are burrowing animals that live in underground tunnels and feed on insects, worms, and other small animals. Moles have small eyes and ears, and their fur is usually black or brown. They have large front feet with long claws that help them dig their tunnels. Moles are solitary animals and are active mainly at night. They are important to the environment because they aerate the soil and help control insect populations.
This is because moles are a unit of measurement that represent the number of particles or grams in a given substance. To convert from moles to particles or moles to grams, you must multiply the number of moles by the number of particles or grams in one mole of the substance.
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A sample of O₂ gas occupies 21.4L at 0.900atm. The temperature is 257K.
What is the mass of the O₂ gas?
The mass of O2 gas is about 6.9 g.
What do you mean by gas law?It is a law which link a gas's pressure, volume, and temperature.
The ideal gas law states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvins.
We can use this equation to find the number of moles of gas, and then use the molar mass of O2 to find the mass of the gas.
First, we can rearrange the ideal gas law to solve for n:
n = (PV) / (RT)
We know that P = 0.900atm, V = 21.4L, R = 0.08206 Latm/molK, and T = 257K.
Substituting these values into the equation:
n = (0.900atm * 21.4L) / (0.08206 Latm/molK * 257K)
Now we know the number of moles of O2 gas. To find the mass, we can use the molar mass of O2, which is 32.00 g/mol.
mass = n * molar mass
mass = n * 32.00 g/mol
So, the mass of O2 gas is about 6.9 g.
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Protons and neutrons
Answer:
1. Isotopes are atoms of an element that consist of the same number of protons but a different number of neutrons.
2. No. of protons = 13
No. of neutrons = 27 - 13
= 14
3. refer to attached file
4(a). Since the noble gases can be found in group 18 of the periodic table, it suggests that they have a complete octet (a full valence shell of electrons), and this allows them to be stable gases that show the least reactivity.
4(b). Since the number of protons and electrons are equal in an atom, the opposite charges are balanced and thus, there is no net charge on the atom (neutrons present in the atom have no charge). Hence, an atom is electrically neutral.
5. Mass no. of X = 6 + 6
= 12
Mass no. of Y = 6 + 8
= 14
6. mass number = no. of protons in the nucleus of an atom + no. of neutrons in the nucleus of an atom
atomic number = no. of protons in the nucleus of an atom
isobars = atoms of elements which have the same mass number but different atomic numbers
isotopes = atoms of elements which have the same number of protons but a different number of neutrons
Indicate the oxidation number of phosphorus, iodine, nitrogen, tellurium, and sillicon in the following ions. Remember that the sum of the oxidation numbers for an ion must equal the charge of the ion.
a. PO43- b. PO33- c. HPO42-
d. P3O103- e. IO3- f. IO2-
g. IO- h. NH4+ i. NO2+
j. NO2- k. NO- l. NO3+
m. N2O22- n. TeO42- o. SiO22-
the oxidation number of the following is a. PO43-: Phosphorus: +5, Oxygen: -2, b. PO33-: Phosphorus: +3, Oxygen: -2, c. HPO42-: Hydrogen: +1, Phosphorus: +5, Oxygen: -2, d. P3O103-: Phosphorus: +5, Oxygen: -2, e. IO3-: Iodine: +5, Oxygen: -2, f. IO2-: Iodine: +4, Oxygen: -2.
g. IO-: Iodine: +1,h. NH4+: Nitrogen: +3, Hydrogen: +1, i. NO2+: Nitrogen: +4, Oxygen: -2, j. NO2-: Nitrogen: +3, Oxygen: -2, k. NO-: Nitrogen: +2, Oxygen: -2, l. NO3+: Nitrogen: +5, Oxygen: -2, m. N2O22-: Nitrogen: +5, Oxygen: -2, n. TeO42-: Tellurium: +6, Oxygen: -2, o. SiO22-: Silicon: +4, Oxygen: -2. The oxidation number (also called oxidation state) of an atom in a chemical compound is a number that represents the degree of oxidation (loss of electrons) of that atom. The oxidation number is assigned based on a set of rules, such as: The oxidation number of an atom in its elemental form is always 0. In a compound, the sum of the oxidation numbers of all atoms must be equal to the charge of the compound (if it is an ion) or 0 (if it is a neutral compound).
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please help - 100 points
Read "Eulogy of the Dog," a speech given by attorney George Vest at a trial in 1870. Then, respond to the question that follows.
Gentlemen of the Jury: The best friend a man has in the world may turn against him and become his enemy. His son or daughter that he has reared with loving care may prove ungrateful. Those who are nearest and dearest to us, those whom we trust with our happiness and our good name may become traitors to their faith. The money that a man has, he may lose. It flies away from him, perhaps when he needs it most. A man's reputation may be sacrificed in a moment of ill-considered action. The people who are prone to fall on their knees to do us honor when success is with us, may be the first to throw the stone of malice when failure settles its cloud upon our heads. The one absolutely unselfish friend that man can have in this selfish world, the one that never deserts him, the one that never proves ungrateful or treacherous is his dog. A man's dog stands by him in prosperity and in poverty, in health and in sickness. He will sleep on the cold ground, where the wintry winds blow and the snow drives fiercely, if only he may be near his master's side. He will kiss the hand that has no food to offer. He will lick the wounds and sores that come in encounters with the roughness of the world. He guards the sleep of his pauper master as if he were a prince. When all other friends desert, he remains. When riches take wings, and reputation falls to pieces, he is as constant in his love as the sun in its journey through the heavens.
If fortune drives the master forth, an outcast in the world, friendless and homeless, the faithful dog asks no higher privilege than that of accompanying him, to guard him against danger, to fight against his enemies. And when the last scene of all comes, and death takes his master in its embrace and his body is laid away in the cold ground, no matter if all other friends pursue their way, there by the graveside will the noble dog be found, his head between his paws, his eyes sad, but open in alert watchfulness, faithful and true even in death.
In a well-written paragraph of 5–7 sentences, explain the meaning and significance of the speaker's use of one rhetorical appeal and one rhetorical device from the list below. Use textual evidence from the speech to support your response.
Rhetorical appeals
ethos
logos
pathos
Rhetorical devices
figurative language
irony
rhetorical question
By the use of rhetorical device, The speaker in "Eulogy of the Dog" uses both pathos and figurative language to make a powerful argument for the importance and loyalty of a dog's companionship.
The speaker evokes a strong emotional response from the audience by describing the unwavering loyalty and devotion of a dog to its master, even in the face of adversity and hardship.
The speaker describes the dog as "the one absolutely unselfish friend that man can have in this selfish world, the one that never deserts him, the one that never proves ungrateful or treacherous." This evokes a sense of sadness and empathy in the audience, as they are reminded of the potential betrayal and unfaithfulness of human relationships.
What is the speaker's use of rhetorical appeal?The speaker was said to have used figurative language to bring the argument to life and make it more relatable to the audience. The speaker describes the dog as "guards the sleep of his pauper master as if he were a prince" and "faithful and true even in death"
In all, the use of pathos and figurative language in the speech helps to create a powerful and emotional argument for the importance and loyalty of a dog's companionship.
The speaker is able to evoke feelings of empathy and sadness in the audience, while also making the abstract concept of loyalty more relatable and tangible.
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Answer: the other guy is correct I got a 90% on that question
Explanation:
The following list contains some common polyatomic ions. Using the charge on these ions and the idea of valence, predict the formulas for the compound formed from the following: nitrate no3-1 phosphate po4-3 sulfate so4-2 acetate c2h3o2-1 ammonium nh4+1 chromate cro4-2 carbonate co3-2 dichromate cr2o7-2 permanganate mno4-1 sulfite so3-2 calcium and phosphate ca 3so 12 ca 3(po 4) 2 capo 4 ca 2(po 4) 3.
A polyatomic ion, often called a molecular ion, is a set of covalently bound atoms or a metal complex that can be thought of as acting as a single unit and has a net charge that is not zero.
Chlorate. ClO₃⁻,Hydroxide. OH⁻,Carbonate. CO₃⁻²,Sulfate. SO₄⁻²,Phosphate. PO₄⁻³,Ammonium. NH₄⁺
What are Polyatomic ions?Similar to how ions are created when neutral atoms acquire or lose electrons, polyatomic ions are created when neutral molecules gain or lose electrons. Because the total number of electrons in the molecule is more than the total number of protons in the molecule, a polyatomic ion is a collection of covalently bound atoms with a net charge. A polyatomic ion's net charge must be equal to the formal charges added to each of its atoms in the Lewis dot structure.
Structure of Polyatomic IonsA molecule that has been ionised by gaining or losing electrons is referred to as a polyatomic ion. The group of atoms that are covalently linked together to form a polyatomic ion has a net charge because the total amount of electrons and protons in the molecule is not equal. When depicting Lewis dot structures, the total charge on a polyatomic ion is equal to the sum of the formal charges on each of the atoms in the ion.
List of Common Polyatomic Ions
[AsO3]3-Arsenate
[BO3]3-Borate
[PO3]3-Phosphite
[PO4]3-Phosphate
[SiO3]2-Silicate
[SO4]2-Sulfate
[SO3]2-Sulfite
[S2O3]2-Thiosulfate
[H2PO4]–Dihydrogen phosphate-
[OH]–Hydroxide
[HSO4]–Hydrogen sulphate
[NO3]–Nitrate
[NO2]–Nitrite
[ClO4]–Perchlorate
[MnO4]–Permanganate
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HELP ME PLEASE!!!!
12C6. 13C6. 14C6
Three isotopes of carbon are found in nature: carbon 13, that has 7 neutrons, carbon 14, that has 8 neutrons, and carbon 12, that has 6 particles (plus 6 protons = 12).
Isotope 13C is it?A naturally occurring stable isotope that carbon with such a nucleus made up of six protons & seven neutrons is called carbon-13 (13C).
What makes carbon-14 an isotope?The amount of protons in an element's nucleus determines how it will react chemically.However, the amount or neutrons in the nucleus of different atoms in the same element might vary.
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Why is it possible to do compositional stoichiometry problems in your head?
It is possible to work on composition stoichiometry in your head because the reaction equations in composition stoichiometry are still simple.
A chemical reaction is a process in which one or more substances are converted into one or different substances and produce new products. The characteristics of a chemical reaction are a change in color or smell, gas or precipitate is formed, and there is a change in energy.
Stoichiometry is the science that studies the quantity of a substance in a chemical reaction. These substances include mass, number of moles, volume, and number of particles. In compositional stoichiometry you will understand the quantitative relationship between the masses or the amount of substance between elements in a compound. Like the amount of Nitrogen and Hydrogen substances that combine to form complex ammonia (NH3). So it allows you to calculate it in your brain because the reaction equation is still simple.
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The structure of 1,1,2,2-tetraiodosilane is as follows:
Strong heating has no effect on this substance. Long-term storage at room temperature is possible, but it must be kept dry because it interacts fast with moisture and water in the air.
On a large scale, it can be produced via the reaction of silicon or silicon carbide with iodine when heated to roughly 200 °C. The interaction of silane with iodine vapor at temperatures between 130 and 150 °C is of more academic interest because a variety of compounds, including iodosilane SiH3I, diiodosilane SiH2I2, and triiodosilane SiHI3, are produced. The liquid forms of these compounds are colorless at normal temperatures. [3] Iodoform, a related carbon compound that is a yellow solid at ambient temperature, can be easily separated from the final one.
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A substance with a pH of 11, how many more times more acidic than a substance with a pH of 1
A substance with a pH of 11 is 10 times more alkaline than a substance with a pH of 1.
What is pH and what is it for?The pH is a data that is used as a reference to classify chemical substances according to their alkalinity or acidity. The pH is measured on a scale from 0 to 14 that is divided as follows:
A pH value of 7 is neutral, which means that the substance or solution is neither acidic nor alkaline.A pH value of less than 7 means that it is more acidic.A pH value of more than 7 means that it is more alkaline.According to the above, it can be inferred that the substance that has a pH of 11 is not more acidic but alkaline. On the other hand, the substance with a pH of 1 is more acidic.
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Determine if a precipitation reaction occurs between aqueous silver nitrate and aqueous calcium chloride. If a precipitation reaction takes place, write a balanced chemical equation, total ionic equation and net ionic equation for the reaction. Identify any spectator ions.
a. Balanced chemical equation:
b. Total ionic equation:
c. Net ionic equation:
d. Spectator ions:
You are not required to adjust the subscript in this case because Silver does have a charge value + and Chlorine does have a charge of -. However, because nitrate has a charge of - and calcium has a charge of 2+.
What are some uses for nitrate?
Natural compounds called nitrates (or nitrites) can be found in soil, air, and water. In order to prevent the development of bacteria and also to improve the color and flavor of food, nitrates are also employed as a food additive.
Why is nitrate poisonous?
The main health consequence of nitrate and nitrite exposure is methemoglobinemia. The clinical appearance may be one of oxygen starvation with cyanosis, cardiac arrhythmias and circulation failure, and developing central nervous system (CNS) consequences, depending on the amount of total MetHb [Skold et al.
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What is the limiting reactant in the balloon with 2.5g of baking soda and vinegar?
The limiting reactant in this reaction is the baking soda (sodium bicarbonate).
What is limiting reactant?A limiting reactant is a reactant in a chemical reaction that is completely consumed before the other reactants. It limits the amount of product that can be formed; the amount of product created is directly proportional to the amount of the limiting reactant present. The term is also known as the limiting reagent. This concept is used in stoichiometry, which is the calculation of the amount of product that can be formed from a given amount of reactants.
This is because it takes more moles of baking soda (NaHCO3) than vinegar (CH3COOH) to cause the reaction to occur. Since there are only 2.5g of baking soda present, it will be used up first and the reaction will stop once all the baking soda has been used.
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what is the fakeing answer
Answer:
to give a fake answer ofc
a nucleotide consists of a nitrogenous base, along with
A nucleotide consists of a nitrogenous base, along with a sugar molecule
A nitrogenous base, a phosphate group, and a sugar molecule with five carbons constitute a nucleotide. The different kinds of nitrogenous bases that can make up a nucleotide are adenine, thymine, guanine, and cytosine. These bases are in charge of the genetic code that is stored in DNA and RNA since they are the base pairs that make up the double helix structure of DNA and the single stranded structure of RNA.
In DNA and RNA, the sugar molecule found within a nucleotide is referred to as deoxyribose. The energy required to power the chemical reactions that build and break the bonds between nucleotides, enabling DNA and RNA to store and transport genetic information, is provided by the phosphate group.
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12. An unidentified mineral that is softer than calcite
exhibits a metallic luster and cubic cleavage. This
mineral most likely is
A) galena
C) halite
B) pyroxene
D) pyrite
Answer: Galena
Explanation:
(A). Galena
An unidentified mineral that is softer than calcite, exhibits a metallic luster and cubic cleavage. This mineral most likely is galena.
What is the name of the mineral that is both soft and hard?Talc, Gypsum, Calcite, Fluorite, Apatite, Feldspar, Quartz, Topaz, Corundum, and Diamond are just a few examples. - The "Mohs Scale of Mineral Hardness" lists common minerals in order of relative hardness, with talc being the softest and diamond being the hardest mineral. This scale should be familiar to rock hounds and earth science students alike.
Is there a metallic sheen to galena?When newly broken, galena is a metallic lead grey with a brilliant metallic shine; as it ages, it turns dark grey or black. It is incredibly hefty and fragile (about 7.6 times as heavy as water). Galena often crystallizes in cubic crystals and cleaves into flawless cubic pieces.
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What type of reaction is 2SO₂ + O₂ ⇾ 2SO₃?
Answer:
the reaction is synthesis When two or more simple compounds combine to form a more complicated one. This is also known as a direct combination reaction.
Explanation:
What is the approximate ph of a 0. 10 m solution of a weak acid that has a ka of 5 x 10-5 m?.
A chemical that releases hydrogen ions into water when coupled with certain metals to form salts.
What is meant by acid?A substance that, when combined with specific metals, creates salts by releasing hydrogen ions into water. Acids taste sour and cause some colours to turn red. Gastric acid is one of the body's natural acids, and it can support organ function. A substance is considered an acid if it tastes sour in aqueous solution, turns blue litmus paper red, reacts with some metals to release hydrogen, reacts with bases to produce salts, and fosters chemical reactions (acid catalysis).
A chemical that tastes sour and when added to water, produces hydrogen ions is referred to as an acid in science. Acids with a pH lower than 7 will cause litmus to turn red. Any material that when combined with hydrogen ions becomes an acid
weak acid:
HA ↔ H+ + A-
∴ Ka = 5 E-5 M = [H+][A-]/[HA]
∴ [HA] = 0.10 M - [A-]
∴ [H+] = [A-]
⇒ Ka = [H+]²/(0.10 - [H+])
substitute the values in the above equation we get
⇒ [H+]² + 5 E-5[H+] - 5 E-6 = 0
simplifying the above equation, we get
⇒ [H+] = 2.211 E-3 M
⇒ pH = - Log [H+]
⇒ pH = 2.6553
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A concentration cell is a cell in which
a. the cell voltage never varies by more than 1.00 × 10−14 V.
b. the voltage is generated because of a difference in concentrations.
c. the concentrations of all cell components are all 1.00 M.
d. the concentrations of all cell components remain constant throughout the life of the cell.
e. none of these
A concentration cell is a cell in which the two half cells have the same electrodes but have the different concentration. so the correct option is e) none of these.
The concentration cell is the electrolytic cell that is made up of the two half - cells that have the same electrodes but different in the concentration. A concentration cell is dilute the concentrated solution and the concentrate more dilute solution. This creates the voltage when the cell reaches an equilibrium state.
Thus , a concentration cell is in which there is the two half cells and having the same electrodes. The concentration is different.
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Which is the proton number?
The chemical entity's atomic number, commonly referred to as the nuclear charge number, is the charging number of an atoms (sign Z). This is the same as the proton amount (pn), which is the number of protons found in typical nuclei.
What is the function of a nucleus?
The nucleus houses the genes, which are parts that contain the genetic material, and regulates and directs the actions of the organism Inside the nucleus, tiny formations known as nucleoli are frequently found. The gel-like matrix where the nuclear components are suspended is known as the nucleoplasm.
How does the nucleus get built?
Atomic nuclei are made up of electrically charged proton and neutral neutrons. These items are held by the strong force, which is the greatest fundamental force that science has discovered.
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a student tried this same procedure (with slight modification) on a gel antacid. The student dissolved 3.00mL in 25.00mL of standardized HCI solution containing 1.727x10^-2 mol of HCI. The back-titration of the excess HCI required 4.62mL of 1.015M NaOH solution.
A) Calculate the molar concentration of the HCI solution that the student used.
B) Calculate the number of miles of HCI neutralized by the antacid tablet.
C) Calculate the volume effectiveness of the gel.
A) The formula for the molarity of HCl is 1.727*10-2 mol/0.025 L= 0.6908 (M). (B) The amount of HCl that one antacid pill neutralises is (0.01727 -0.0046893) mol = 0.0125807 mol.(C) The gel's volume efficacy is 0.004194/0.01*1000, or 419.4 mL.
An aqueous solution of hydrogen chloride is what is known as hydrochloric acid (HCL), commonly referred to as muriatic acid. It has an unmistakably strong odour and is colourless. It is categorised as a powerful acid. In the digestive tracts of the majority of animal species, including humans, it is a part of the stomach acid. The creation of inorganic and organic chemicals, the removal of metal stains, the extraction of oil, the purification of table salt, and pH control all include the usage of HCl. Acid hydrochloride is an inorganic substance. With the chemical formula HCl, it is a very corrosive acid. Muriatic acid and hydrogen chloride are other names for it.
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Draw the dipeptide Val-Tyr at pH 7.0 Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Temp needed. The single bond is active by default.
At pH 7.0, Valine and Tyrosine will both exist in their uncharged forms. The Valine will be drawn as a CH₃CH(NH₂)₂ group and the Tyrosine will be drawn as a C₆H₄CH(OH)CH₂NH₂ group.
Both amino acids will be linked together by a peptide bond, which is a covalent bond that will be formed between the carboxyl group of one amino acid and the amino group of another amino acid. This will create the dipeptide Val-Tyr, which will be drawn as a
CH₃CH(NH₂)CO-C₆H₄CH(OH)CH₂NH₂.
The carboxyl group of Valine will be linked to the amino group of Tyrosine, forming a single molecule.
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Consider the physical and
chemical properties
shown on the SDS. At
what temperature will
Napthalene, a chemical
found in moth balls, melt?
A. 100 °C
B. 1.0253 °C
C. 217.9°C
D. 80.2 °C
Answer:
C
Explanation:
Don't think too much. Go with short to the point way... Melting point is always go with lowest point 80.2 degree C