The total amount of water produced is equal is 12.5 moles or 250g of H2O.
What is moles?Moles are small, burrowing creatures found in gardens, yards, and fields. They are members of the Talpidae family and most commonly found in the Northern Hemisphere. Moles are adapted to living underground, where they eat earthworms, grubs, and other small invertebrates. They also consume plant material and are known to damage lawns and gardens. Moles have large claws and a pointed snout which they use to dig tunnels and chambers.
The amount of water produced by the combustion of 25.0g of H2 in the presence of 100g of O2 can be calculated using the balanced equation and the law of conservation of mass. The equation shows that 2 moles of water is produced by the combustion of 1 mole of H2 and 1 mole of O2.
Since 25.0g of H2 is equal to 1.25 moles and 100g of O2 is equal to 5 moles, then the total amount of water produced is equal to 2 * 1.25 * 5 = 12.5 moles or 250g of H2O.
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Draw the Lewis structure for CH5N. How many lone pairs does it have?
Lewis structure for CH₅N has one lone pair.
A lone pair, also known as an unshared pair or a non-bonding pair, is an unshared pair of valence electrons that are not shared with another atom in a covalent bond in chemistry. Atoms' outermost electron shell contains lone pairs. The Lewis structure can be used to locate them. Therefore, if two electron pairs are coupled but are not utilized in chemical bonding, they are referred to as lone pairs. As a result, the amount of valence electrons surrounding an atom is equal to the sum of the electrons in lone pairs and those in bonds.
In the valence shell electron pair repulsion theory (VSEPR theory), which describes the morphologies of molecules, the idea of a lone pair is employed. They are also mentioned in relation to Lewis acids and bases in chemistry. Chemists do not, however, always classify non-bonding electron pairs as lone pairs. Examples include transition metals, where non-bonding pairs are believed to be stereochemically inactive and do not affect molecular shape. The idea of a lone pair is less clear in molecular orbital theory (completely delocalized canonical orbitals or localized in some way), as the relationship between an orbital and the elements of a Lewis structure is sometimes not clear-cut. However, orbitals that are largely nonbonding or that are occupied are typically classified as lone pairs.
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Using the solubility rules in your Reference Tables (page 6), which of the following reactions would occur?
A. CaBr2 + 2KNO3 --> Ca(NO3)2 + 2KBr
B. Ca(NO3)2 + 2HCl --> CaCl2 + 2HNO3
C. 3CuBr3 + 2AlCl3 --> 3CuCl2 + 2AlBr3
D. 3AgNO3 + K3PO4 --> Ag3PO4 + 3KNO3
Answer: Option b is correcr
Explanation: ption A: The relevant solubility rule is: Compounds with halides are soluble except when with silver, lead, or mercury. Therefore the products of this reaction are all soluble and the reaction will not occur as no precipitate is made.
Option B: In addition to the solubility rule stated in Question A, all nitrates are soluble. Therefore the products of this reaction are all soluble and the reaction will not occur as no precipitate is made.
Option C: Based on the solubility rules already mentioned, the products of this reaction are all soluble and the reaction will not occur as no precipitate is made.
Option D: Most compounds of phosphate are insoluble with exceptions being with ammonium and some Group 1A metals. Based on this, the silver phosphate
Ag will be insoluble and form a precipitate. Therefore this reaction will occur and Option D is the correct answer
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an object has a fixed volume and shape before it changes state. After the change, it still has a fixed volume but can now change in shape. Which change of state has occurred?
A. gas to liquid
b. gas to plasma
c. solid to liquid
d. liquid to gas
The object with fixed volume and shape is a solid. When it converts to liquid, it miss the shape but still have a definite volume. Thus, the given phase transition is solid to liquid.
What is phase transition ?The transition of one state of matter to the other is called phase transition. For example the transition from liquid to solid or solid to gas etc. are phase transitions. Phase transitions are physical changes.
In solid state, the particles are closely packed with strong intermolecular forces. Thus, they have a definite shape and size. In liquid phase, the molecules have some space to move and they lack a perfect shape and assume the shape of the container.
The molecules in gas phase, are far apart and they don't have a shape and volume. Therefore, the given transition is from solid to liquid. Hence, option c is correct.
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How many formula units are in 4.43 g of N2 molecules?
There are 9.6 * 10^22 formula units in 4.43 grams of the nitrogen molecule.
What is the number of the formula units?We know that the number of the formula units that we have can easily be obtained from the use of the Avogadro's hypothesis. Let us note that we can see that there are 4.43 g of the nitrogen molecules.
We have the number of moles of the nitrogen molecules as;
Number of moles = mass/molar mass
= 4.43/28 g/mol
= 0.16 moles
If 1 mole of the molecule contains 6.02 * 10^23 formula units
0.16 moles would contain 0.16 * 6.02 * 10^23/ 1
= 9.6 * 10^22 formula units
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2. Most of the elements in groups 16 through 18 are classified as
a. alkali metals.
c. nonmetals.
b. inner transition metals.
d. alkaline earth metals.
The correct option c. nonmetals. Nonmetals make up the majority of the elements of groups 16 through 18.
Explain the properties of elements of groups 16 through 18.The position of an element on this periodic table has a significant impact on how that element is defined.
On the periodic table, there are a total of eight columns that seem to be taller than every other column. The primary group consists of those eight towering columns. Each element in the core group has a significant propensity to generate ions with predictable outcomes. The primary group elements constantly create charge between +1 and -4 based on the group number.Elements of groups 16 through 18:
Non-metals make up the elements of groups 16 through 18. These elements mostly exist as vapors or fragile solids. They frequently function poorly as heat and electricity conductors. These non-metals are frequently gases at ambient temperature since they are known to have substantially lower melting temperatures than metals.To know more about the elements, here
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the compound being dissolved into a liquid ___
Please help, will give brainiest
QUESTION 1.
Element X on Planet Qatar has three known isotopes: X-121 with a relative abundance of 43.2%, X-123 with a relative abundance of 53.1%, and X-129 with a relative abundance of 3.70%. What is the average atomic mass in amu of Element X given this information?
QUESTION 2.
How did Rutherford's experiment change the way scientists had previously viewed atomic structure? How did this pave the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model?
QUESTION 3.
How is percent abundance related to average atomic mass?
Answer 1
The average atomic mass in a.m.u of Element X given this information is 122.358.
Answer 2
Rutherford's experiment change the way scientists had previously viewed atomic structure as it provided insight into atomic structure.
Rutherford's experiment paved the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model as his model of the atom, the structure of the nucleus became more well-defined following the discovery of protons (1919) and neutrons (1932) as the particle constituents of the nucleus.
Answer 3
The percent abundance is related to the number fraction as fi = Pi/100 and used as in the formula written above in order to find average mass
What is atomic structure?Atomic structure refers to the structure of an atom comprising a nucleus (centre) in which the protons (positively charged) and neutrons (neutral) are present.
The average atomic mass in a.m.u of Element X given this information is ((121 * 43.2) + (123 * 53.1) + (129 * 3.70)) / 100
=5227.2 + 6531.3 + 477.3
=12235.8 / 100
122.358
Rutherford's experiment change the way scientists had previously viewed atomic structure as it provided insight into atomic structure, and Rutherford's model of the atom was proposed as a small, positive, massive nucleus contains the very vast majority of the mass of the entire atom with negatively charged electrons surrounding it at relatively large distances.
Rutherford's experiment paved the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model as his model of the atom, the structure of the nucleus became more well-defined following the discovery of protons in 1919 and neutrons in 1932 as the particle constituents of the nucleus.
It was during the 1920s that a "wave mechanical model" came along through the work of several physicists most importantly de Broglie, Heisenberg, and Schrodinger) and Bohr's concept of electrons "orbiting" the nucleus was abandoned in favor of "orbitals" which are more abstract probabilistic representations of electronic structure within an atom.
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What is the number of nitrogen molecules that reacted with excess hydrogen to make 2 x 10^10 molecules of ammonia? 3H2 + N2 <-------> 2 NH3 a. 2 x 10^10 b. 3 x 10^10 c. 5 x 10^9 d. 1x 10^10
The number of nitrogen molecules that reacted with excess hydrogen to make 2 × 10¹⁰ molecules of ammonia is 1 × 10¹⁰ molecules.
Given that :
The molecules of the Ammonia = 2 × 10¹⁰ molecules
The reaction is given as :
3H₂ + N₂ ⇄ 2NH₃
1 mol = 6.022 × 10²³ molecules
from the reaction it is clear that :
1 mole of the N₂ will produces the 2 mol of the ammonia.
therefore, 1 molecule of the nitrogen produces 2 mol of the ammonia
molecules of the nitrogen, N₂ = 2 × 10¹⁰ / 2
= 1 × 10¹⁰ molecules.
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What is the temperature of a hot day in the desert? Select the better estimate. 47C 47F
Temperature. The desert reaches an average daily temperature of 38°C (just over 100°F). Desert nighttime temperatures typically drop below -3.9°C (approximately 25°F).
What is the desert's highest temperature?
The world's hottest air temperature was recorded at Death Valley: A scorching 56.7°C (134.1°F) was recorded on July 10, 1913, in the California desert's aptly called Furnace Creek location. Meanwhile, the average summer temperature frequently exceeds 45°C (113°F).
What is the desert's lowest temperature?
Desert surfaces lose nearly twice the same or more heat at night as humid ones do and receive slightly more than twice as much solar energy. Many average annual temperatures fall between 20 and 25 °C. The extreme maximum temperature is between 43.5 and 49 degrees Celsius. At times, the minimum temperature falls below -18 degrees Celsius.
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Firt, once in the imulation, click on "olution value". Move the blue lever (olute amount) and (olution volume) to the required amount and find the molarity of the following:
1. Uing Drink Mix mode:
a. What i the molarity when. 772 mole are diolved in. 500 Liter of water?
b. What i the molarity when. 453 mole are diolved in. 450 Liter of water?
Using Drink Mix mode:
a. To find the molarity when 772 moles of a solute are dissolved in 500 liters of water, you can use the formula:
Molarity (M) = number of moles of the solute present in the solution / liters of solvent
Molarity (M) = 772 moles / 500 liters
= 1.544 M
b. To find the molarity when 453 moles of a solute are dissolved in 450 liters of water, you can use the formula:
Molarity (M) = number of moles of the solute present in the solution / liters of solvent
Molarity (M) = 453 moles / 450 liters
= 1.01 M
It's worth noting that molarity is a unit of concentration and is often used to describe the concentration of a solute in a solution. It is calculated as the number of moles of solute per liter of solvent.
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Can someone please help me! No false answers please!!
The formula for a substance is D4 and its molar mass is 30 g. A student is given 150 g of the substance and is asked how many atoms are in the sample. She says there are 5 times Avogadro's number (6.022 x 102) of atoms in her sample. The student is in error, identify her error and explain what the correct answer should be.
The student's error is that she is assuming that the number of atoms in a sample is directly proportional to the mass of the sample. Avogadro's number (6.022 x 10²³) represents the number of atoms or molecules in one mole of a substance. However, the number of atoms in a given mass of a substance depends on the molar mass (mass per mole) of the substance, not the Avogadro's number.
The correct way to determine the number of atoms in a sample is to use the formula:
number of atoms = mass of the sample / molar mass
In this case, the molar mass of the substance is 30 g/mol, so the number of atoms in 150 g of the substance is:
number of atoms = 150 g / 30 g/mol = 5 mol
The correct answer is 5 moles of atoms, which is not equal to 5 times Avogadro's number. Therefore, the student's answer is incorrect.The student's error is that she is assuming that the number of atoms in a sample is directly proportional to the mass of the sample. Avogadro's number (6.022 x 10²³) represents the number of atoms or molecules in one mole of a substance. However, the number of atoms in a given mass of a substance depends on the molar mass (mass per mole) of the substance, not the Avogadro's number.
The correct way to determine the number of atoms in a sample is to use the formula:
number of atoms = mass of the sample / molar mass
In this case, the molar mass of the substance is 30 g/mol, so the number of atoms in 150 g of the substance is:
number of atoms = 150 g / 30 g/mol = 5 mol
The correct answer is 5 moles of atoms, which is not equal to 5 times Avogadro's number. Therefore, the student's answer is incorrect.
Cat or Dog?
Zebra or Tiger?
China or NYC?
Sing or Dance?
Exercise or Yoga?
Gaming or Study?
Cooking or Reading?
:3 bye hope you have a lovely day!
Answer:
Dog
Zebra
Sing
Yoga
Gaming
Cooking
bonding theories and molecular geometry lab
Valence bond theory, Lewis theory and the molecular orbital theory are the three bonding theories in chemistry. Molecular geometry is the three dimensional arrangement of atoms in the molecule.
Bonding theories are the vital postulates in chemistry that provide the basic information regarding the bonds present in a particular molecule. Three bonding theories are Lewis theory, valence bond theory, and molecular orbital theory. In Lewis theory, the electrons and lone pairs are symbolized as dots surrounding the atom. In valence bond theory, electrons are shared among orbitals of atoms, that forms bonds. In molecular orbital theory, two atomic orbitals combine to make a molecular orbital. Bonding theories are very significant as they maintain the orientation in a bond. They provide information on the sort of bond present in the molecule, the sort of bonding taking place to form a simple or complex compound.
Molecular geometry is also known as the molecular structure. It is the three-dimensional structure or arrangement of atoms in a molecule. Helps to understand the molecular structure of a compound. It helps to determine the polarity, reactivity, phase of matter, color, magnetism, as well as the biological activity.
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The complete question is,
Explain bonding Theories and molecular geometry.
What is C in bohr’s equation?
Formula
[tex]\ell=\frac{n h}{2 \pi}[/tex]
[tex]\ell = angular \: momentum[/tex]
[tex]n = principal quantum number \\ h = Planck's constant \\ \pi = pi[/tex]
Draw a Lewis diagram for the amine C2H5NH2
The carbon atom forms a 4 sigma bond and is SP 3 with tetrahedral geometry. It is also SP 2 hybridized with tetragonal planner geometry with a 3 sigma & 1 bond. an oxygen atom with two loan electrons
What does a carbon atom represent?A live organism's body, coal, a carbon dioxide particle, and other kinds of existence are only a few examples of the many various ways that carbon can exist. Carbon atoms can change their forms as a result of several processes. Carbon can appear in a variety of things, such as carbon dioxide, anthracite, a cow, sugar, and diamond.
What is a simple carbon atom?It is a non-metal, denoted by the symbol C. There are 6 protons, 6 neutrons, and, of course, 6 electrons in it. Because of its almost infinite capacity for bonding with other carbon atoms, a carbon atom is regarded as distinctive and unique.
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When HBr is added to 2-methyl-1,3-butadiene to produce singleaddition products, two products are obtained as shown below. Usinga reaction coordinate diagram and your knowledge of kinetic andthermodynamic control, explain why compound I is formed ingreatest abundance at low temperature and compound II is formed asthe major product at high temperature.
Low temperatures cause the reaction to move in the direction of the product that will produce the Compound 2 is more stable at the high temperature since it is the more substituted alkene.
A substance made up of two or more components is called a compound. Table salt, water, and carbon dioxide are a few examples of compounds. The two fundamental categories of compounds are. The way the atoms in the molecule bond to one another defines who we are. Salt compounds and molecular compounds are two examples of these categories. a material created by chemically joining two or more distinct components. Examples of compounds are table salt (NaCl), which is generated from the elements sodium and chloride, and water (H2O), which is created from the components hydrogen and oxygen.
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For a given recipe, 14 cups of flour are mixed with 21 cups of sugar. How many cups of flour should be used if 36 cups of sugar are used?.
A student has measured the volume of a sample of hydrogen gas and has found that
she has a total of 15.84 moles of the gas. What is the mass of this sample of
hydrogen gas? Please round your answer to two digits after the decimal point, and
remember to include correct, complete units (including substance formula).
The correct answer is 2.03×1/10² mol
500 cm³ = 0.5 L,760 mm of Hg=1 atm.
Now apply the ideal gas law, n= PV/RT
n= 1×0.5/ 0.0821×300
⟹n=2.03×10 ^−2 mol
What is the ideal gas law?
It is also called the general gas equation, is the equation of state for a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions, although it has several limitations. It was first stated by Benoît Paul Émile Clapeyron in 1834 as a combination of the empirical Boyle's Law, Charles' Law, Avogadro's Law, and Gay-Lussac's Law.To know more about ideal gas law, click the link given below:
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What is the result of DNA replication identical?
The result of DNA replication identical is two DNA molecules consisting of one new nucleotide chain and one old chain.
DNA replication is a process of doubling the DNA chain assisted by DNA polymerase enzymes in the interphase before mitosis. Prokaryotes carry out continuous DNA replication and eukaryotes carry out DNA replication in the S phase of the cell cycle before mitosis. DNA replication aims to produce new DNA that is identical to the parent cell's DNA so that DNA replication is described as semi-conservative.
The semi-conservative theory resulted in two DNA strands consisting of one old strand and one new double helix with exactly the same information as the old DNA. The result of DNA replication is two DNA molecules consisting of one new nucleotide chain and one old chain. That is why the results of DNA replication have the same or identical properties.
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can anyone help me with this question?
If the weight in gm of the sample is 0.040 moles of salt (NaCl) then Molar mass of NaCl = 58.44 g/mol.
Define molar mass?The ratio between the weight and the amount of substance in any sample of a chemical compound is known as the molar mass of that compound. The molar mass of a compound is a bulk property instead of a molecular one.
By using formula: n=m / M m=n×M
m=(0.040)x(58.5) m=2.34g
So,
It means that if we prepare a 100cm3 solution using 2.34g of NaCl, the solution's concentration will be 0.500 mol/dm3.
Molar mass of Nacl = 58.44 g/mol
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What is the molarity of the solution produced when 145 g of sodium chloride (NaCI) is dissolved in sufficient water to prepare 2.75 L of solution?
The molarity of the solution produced when the 145 g of sodium chloride (NaCI) is dissolved in the sufficient water to prepare the 2.75 L of solution is 0.90 M.
Given that :
Mass of the sodium chloride NaCl = 145 g
Volume of the NaCl = 2.75 L
The molar mass of the NaCl = 58.4 g/mol
The moles is given as :
Moles = mass / molar mass
Moles = 145 / 58.4
Moles = 2.48 mol
The molarity expression is given as :
Molarity = moles / volume in L
Molarity = 2.48 / 2.75
Molarity = 0.90 M
Thus, the molarity of KCl is 0.90 M.
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Earth is the third planet from the sun why is this an insignificant claim
Answer:
The third planet from the sun is the one you happen to be living on right at this very moment. Yes, that is planet Earth.
Explanation:
It tells us how far the planet we are currently living on is towards our star (aka the sun) which is why that information/statement/claim is important.
the number of objects in a mole of something is dictated by which constant? One mole of a substance is equal to 6.022 xd7 10xb3 units of that substance (such as atoms, molecules, or ions). The number 6.022 xd7 10xb3 is known as Avogadro’s number or Avogadro’s constant. The concept of the mole can be used to convert between mass and number of particles.. Created by Sal Khan.
a. true
b. false
The given statement is true since the number of objects in a mole is dictated by a quantity called Avogadro's number.
Avogadro's number is quite an important quantity in chemistry as well as other branches of science. It tells us how many atoms are there in one gram atom of a compound, how many molecules are there in one gram molecule of a compound, and how many ions are there in one gram of ions in a substance.
It was discovered by the Italian scientist Amedeo Avogadro and thus, named after him. Its value is = 6 . 022 × 10²³ mol⁺¹ and its SI unit are the reciprocal of a mol (mol⁺¹). Hence, the given statement is indeed true.
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explain in terms of their structures and bonding their relative melting points strengths and abilities to conduct electricity of graphene diamond and fullerene
Around 3600 degrees Celsius is the temperature at which graphite melts, but it sublimes rather than melting. Tetrahedrally organised carbon atoms are found in diamond, whereas there are an infinite number of carbon atoms in graphite.
What is melting point?The temperature at which a substance transforms from a solid into a liquid is known as its melting point. The temperature at which a substance transforms from a solid into a liquid is known as its melting point. The balance between the solid and liquid phases is reached at the melting point. Pressure affects a substance's melting point, which is often reported at a standard pressure of 1 atmosphere, or 100 kPa. The melting point is the fixed temperature at which a solid transforms into a liquid. For instance, at 0°C, ice cubes begin to melt and turn from a solid to a liquid.
How do you find melting point?By placing a small amount of an organic solid in a tiny capillary tube, affixing it to the stem of a thermometer centred in a heating bath, and gradually heating the bath, one may calculate the temperature at which melting begins and finishes. Melting points are frequently used to describe and rate the purity of organic and inorganic crystalline substances. Pure compounds melt at a fairly narrow temperature range of 0.5 to 1 °C, whereas contaminated, impure chemicals frequently show a huge melting gap.
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howany grams of carbon dioxide CO2 is produced when 3.5 moles of octane C8H18 is burned ?
Answer:
1232 g of carbon dioxide are formed
Explanation:
As octane is being burned it would be combustion reaction.
writing the balanced equation:
C8H18 + 25/2 O2 → 9 H2O + 8 CO2
now stepping up mole ratio from the balanced equation:
moles of octane : moles of carbon dioxide
1 : 8
3.5 : X
X = 3.5 x 8 = 28
therefore when 3.5 moles of octane are burned in air 28 moles of carbon dioxide are evolved.
now in order to calculate the mass of CO2 formed
molar mass of CO2 = 12 + (16 x 2) = 44g
now calculating the mass of 28 moles:
moles : mass
1 : 44 g
28 : X
X = 28 x 44 = 1232 g
1232 g of CO2 are formed
Turpentine (Csub10Hsub16) can react with chlorine gas to make carbon and hydrogen monochloride: Csub10Hsub16 (l) + 8Clsub2 (g) > 10C (s) + 16HCl (g) Suppose a chemist runs this reaction and makes 569g of carbon. How many grams of turpentine were consumed?
As per the given reaction, one mole or 136 g of turpentine produce 10 moles or 120 g of carbon. Then to produce 569 g of carbon 644.8 g of turpentine is required.
What is theoretical yield?The theoretical yield of a product in a reaction is determined using the balanced equation of the chemical reaction. Actual yield of the product might vary from the theoretical yield.
Given the balanced reaction of turpentine with chlorine gas producing carbon and HCl. Here, one mole of turpentine produces 10 moles of carbon.
molar mass turpentine = 136 g/mol
atomic mass of carbon = 12 g/mol
mass of 10 moles = 120 g
136 g of turpentine produces 120 g of carbon. Then, mass of turpentine required to produce 569 g of carbon is :
(136 × 569) /120 = 644.8 g
Therefore, the mass of turpentine consumed in the reaction is 644.8 g.
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What is the mass in grams of 2.3 moles of barium sulfate?
Answer:
536.79608
Explanation:
Draw the Lewis structure of CH3OH2+.
Draw the Lewis dot structure of CH3OH2+.
The lewis structure of the CH₃OH₂⁺ :
H
| ..+
H - C - O - H
| |
H H
The given molecule is :
CH₃OH₂⁺
The number of the valence electrons of the carbon = 4
The number of the valence electrons of the hydrogen = 1
The number of the valence electrons of the oxygen = 6
The lewis structure for the molecule is given as :
H
| ..+
H - C - O - H
| |
H H
H
: ..+
H : C : O : H
: :
H H
The compound given has the formal charge of +1.
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How is the periodic table divided? (Where do we find metals, nonmetals and metalloids?)
Answer:
Explanation: you have to divide the simbles
Please help chemistry
The calculated theoretical yield for the
reaction below was 54.25 g Al2O3. Instead,
only 16.81 g Al2O3 was collected. What is
the percent yield?
4AI + 302 → 2Al2O3
9.119
30.99
322.7
37.44
The percentage yield of the reaction from the given parameters would be 30.99%. Option B.
Percent yieldThe percent yield of a reaction is the actual amount of product formed relative to the theoretical amount of product that is supposed to be formed from the same reaction.
This is mathematically expressed as:
Percent yield = actual yield/theoretical yield x 100%
In this case: the actual yield = 16.81 g, the theoretical yield = 54.25 g
Thus, the percent yield of the reaction can be calculated as:
16.81/54.25 x 100% = 30.99%
In other words, the percent yield of the reaction would be 30.99%.
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Answer: B. 30.99%
Explanation: