The equilibrium constant between C6H5COOH and [tex]CH_3COO^-[/tex] is 3.6 at [tex]25^0C[/tex]. Given that the acid dissociation constant (Ka) for [tex]CH_3COOH[/tex] is [tex]1.8 * 10^–^5[/tex], we need to determine the acid dissociation constant for [tex]C_6H_5COOH[/tex].
The equilibrium constant (K) relates to the concentrations of the reactants and products at equilibrium. For the given reaction, the equilibrium constant (K) is expressed as [tex][C_6H_5COO^-][CH_3COOH]/[C_6H_5COOH][CH_3COO^-][/tex] and is equal to 3.6 at [tex]25^0C[/tex].
To find the acid dissociation constant (Ka) for [tex]C_6H_5COOH[/tex], we can use the relationship between K and Ka. Since the reaction involves the acid [tex]C_6H_5COOH[/tex], we can write the equation as follows:
[tex]C_6H_5COOH =C_6H_5COO^-+ H^+[/tex]
The equilibrium constant (K) for this reaction is equal to[tex][C_6H_5COO^-][H^+]/[C_6H_5COOH][/tex]. We can relate this to the acid dissociation constant (Ka) by noting that [[tex]H^+[/tex]] is equivalent to the concentration of the dissociated acid, and [[tex]C_6H_5COOH[/tex]] is the initial concentration of the acid.
Since the acid dissociation constant (Ka) for [tex]CH_3COOH[/tex] is given as [tex]1.8 * 10^-^5[/tex], we can set up the following equation:
[tex]1.8 *10^-^5 = [C_6H_5COO^-][H^+]/[C_6H_5COOH][/tex]
Knowing that the equilibrium constant (K) is 3.6, we substitute the appropriate values into the equation:
[tex]3.6 = [C_6H_5COO^-][CH_3COOH]/[C_6H_5COOH][CH_3COO^-][/tex]
By rearranging the equation and substituting the given values, we can solve for the acid dissociation constant (Ka) of [tex]C_6H_5COOH[/tex].
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Consider the balanced equation below.
N2H4 + 2H2O2 Right arrow. N2 + 4H2O
What are the mole ratios of hydrazine (N2H4) to hydrogen peroxide (H2O2) and hydrazine to water?
1:2 and 1:4
1:3 and 1:4
1:2 and 3:5
1:3 and 3:5
Answer:
Explanation: The reaction between hydrazine and hydrogen peroxide yields nitrogen and water. The balanced chemical reaction is:
N2H4 + 2H2O2 N2 + 4H2O
which means that the mole ratio between hydrazine and hydrogen peroxide is 1:2 and the mole ratio between hydrazine and water is 1:4.
Chlorine gas is applied at a rate of 40 pounds per day to a well operating at 1250 gpm. What is the chlorine dosage for this well, expressed in parts per million
2.7 is the chlorine dosage for this well, expressed in parts per million.
Unlike municipal water, well water does not go through a water treatment facility. That implies that it could be contaminated with poisons like lead, coliform bacteria, volatile chemical compounds, and others. chlorination in well water is done to fulfill the role that chlorine plays in municipal sources' water disinfection processes.
It is advised to start with a chlorine concentration of 50 to 100 parts per million (ppm).
Bacterial pollutants are eliminated from well water, well casings, holding tanks, and the entire water delivery system via shock chlorination. To shock chlorinate, a well driller with a license is trained.
Algae have been linked to green water, and they may thrive in both surface water and groundwater wells even in the absence of sunshine. Algae can color the water in both the pre-and post-decomposition stages with a variety of hues, including green, brown, and reddish.
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The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is _____.
Metal which produces hydrogen gas:
Aluminum metal produces hydrogen gas with dilute hydrochloric acid as well as sodium hydroxide.
What are amphoteric oxides?
Amphoteric oxides are the metal oxides which reacts with both acids and bases.
Some metals are also amphoteric, ie. on reaction with acid or base, the product will be salt and Hydrogen gas.
Amphoteric metal + acid/base → salt + hydrogen gas
Few metals of the periodic table are amphoteric in nature. Like Aluminum, Zinc etc.
Reactions:
Reaction with dilute NaOH:
2Al + 2NaOH + 2[tex]H_{2}[/tex]O → 2NaAl[tex]O_{2}[/tex] + [tex]H_{2}[/tex]
Reaction with dilute HCl:
2Al + 6HCl(aq) → 2Al[tex]Cl_{3}[/tex] + 3[tex]H_{2}[/tex]
Dilute and Aqueous (aq) means mixed with water ([tex]H_2O[/tex])
These reaction are balanced in order to follow the Law of conservation of mass.
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If a reaction occurs, what will be the products of the unbalanced reaction below?Zn(s) + HCl(aq) -->
A. No reaction will occur
B. ZnH(s) + Cl2(g)
C. ZnCl2(s) + H2(g)
D. HZnCl(s)
The products will be [tex]ZnCl_2(s) + H_2(g)[/tex]
Chemical reactionsZn is higher than hydrogen in the reactivity series. Thus, it will be able to displace hydrogen from the acid.
The equation of the reaction becomes: [tex]Zn(s) + HCl(aq) -- > ZnCl_2 (s) + H_2 (g)[/tex]
Hydrogen gas is released as a result. In fact, it is one of the ways of preparing hydrogen gas in the laboratory.
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Some analytes must be derivatized to increase their column retention or detectability. Derivatization means Group of answer choices altering the chemical structure of the analyte to increase detection and specificity. adding fluorescent labels or combining the analyte with chiral reagents or other chemicals to increase detectability. removing dissolved gases in the solvent to produce a clear chromatogram. using multiple detectors to assist in identification.
Derivatization means adding fluorescent labels or combining the analyte with chiral reagents or other chemicals to increase detectability.
Some analytes must be derivatized to increase their column retention or detectability.
Retention time can be referred to as the amount of time a solute spends in the stationary and mobile phases of a column.
Detectability is the ability of an analyte to get detected in the mobile phase of chromatography.
The refractometer, fluorescence detector, and UV detector are the three most popular liquid chromatography detectors. These detectors increase the detectability.
For derivatization, the fluorescence detector are used.
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chemical engineer has determined by measurements that there are moles of nickel in a sample of nickel tetracarbonyl. How many moles of oxygen are in the sample
A chemical engineer has determined by measurements that there are 7.0 moles of carbon in a sample of nickel tetracarbonyl. 7 moles of oxygen are in the sample.
What is Stoichiometry ?Stoichiometry helps us use the balanced chemical equation to measure quantitative relationships and it is to calculate the amounts of products and reactants that are given in a reaction.
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
According to Stoichiometry
[tex]7\ \text{mol C} \times \frac{1\ \text{mol O}}{1\ \text{mol C}}[/tex]
= 7 mol O
Thus from the above conclusion we can say that A chemical engineer has determined by measurements that there are 7.0 moles of carbon in a sample of nickel tetracarbonyl. 7 moles of oxygen are in the sample.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: This is the chemical formula for Nickel Tetracarbonyl (a powerfully poisonous liquid used in Nickel Refining).
Ni(CO)₄
A chemical engineer has determined by measurements that there are 7.0 moles of carbon in a sample of nickel tetracarbonyl. How many moles of oxygen are in the sample ?
Aqueous hydrobromic acid reacts with solid sodium hydroxide to produce aqueous sodium bromide and liquid water . What is the theoretical yield of water formed from the reaction of of hydrobromic acid and of sodium hydroxide
Mass of water produced is equal to 7.2 grams.
The reactants are reacting according to the following equation:
HBr + NaOH = NaBr + H2O
1 mole of HBr requires 1 mole of NaOH to be totally transformed into NaBr and water.
Now, let us calculate the amounts of HBr and NaOH in mols:
m(HBr) = 67.2g
m(NaOH) = 16g
M(HBr) = 80.9g/mol
M(NaOH) = 40g/mol
Following the simple relation
n(moles) = m(grams)/M(g/mol)
n(HBr) = 67.2g/(80.9g/mol)
n(NaOH) = 16g/(40g/mol)
n(H2O) = n(NaOH) = 0.40 mol, which is:
m(H2O) = n(H2O) x M(H2O)
0.40mol∗18g/mol=7.2g
Finally, the mass of water produced is equal to 7.2 grams.
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What is the bonding requirement for carbon atoms?
Answer:
carbon atoms tend to make four bonds, each carbon atom will have the number of hydrogen atoms that are required for four bonds. This compound contains 16 hydrogen atoms for a molecular formula of C 8 H 16.
Explanation:
JUST TO BE CLEAR, I DON'T NEED THE ANSWER TO THIS QUESTION, BUT I REALIZED THAT NO ONE HAS ASKED THIS QUESTION SO I'M ASKING AND ANSWERING MY OWN QUESTION! This is in regards to a lab that deals w/ "Absorption and Radiation by Land and water" where you identify variables in the effect of type of material on Absorption experiment!
Question: Answer the questions using the drop-down menus.
Which is the independent variable in this experiment?
Answer: type of material
Which is the dependent variable in this experiment?
Answer: temperature of material
Which is a controlled variable in this experiment?
Answer: amount of heat materials received
And IK these are the right answers because I just took the test on Edge, and these answers are right.
Based on the type of experiment that is being conducted:
The independent variable is: type of materialsThe dependent variable is: temperature of materialThe controlled variable is the amount of heat materialWhat is an independent variable?This is the term that is used to refer to the variable that is used to arrive at conclusions about the dependent variable.
The experiment is trying to tell us that the temperature of a material is the function of the heat applied to it and the type of material.
The dependent variableThis is the term that is used to refer to the variable of interest. It is what is being tested in the experiment.
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To make a solution of lemonade, lemon juice and sugar are dissolved in water. the water is the ______ in this example.
To make a solution of lemonade, lemon juice and sugar are dissolved in water. the water is the Solvent in this example.
Solvent Examples. Common examples of solvents consist of water, ethanol, methanol, and acetone. The term 'solvent' may be defined as a substance that has the ability to dissolve a given solute to form a solution with it.
Solvents are substances that are used to dissolve the solutes used in the formulation. These solutes can be solids, liquids, or gaseous in nature. Thus solvents are used to get a solution upon interacting the solute with a suitable solvent.
Solvents are usually, however not usually, liquids. They can also be gases or solids. The material dissolved in the solvent is referred to as the solute. collectively, the solvent and solute comprise the solution.
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What is the balanced chemical reaction for Mg+H2=MgH, K+O2= KO, K+S= KS, Ba + Br2= BaBr, Ca + N2= CaN
(Giving brainliest for the answer that shows work) Please and thank you!
Answer:
1.) 2 Mg + H₂ ------> 2 MgH
2.) 2 K + O₂ -----> 2 KO
3.) K + S -----> KS
4.) 2 Ba + Br₂ -----> 2 BaBr
5.) 2 Ca + N₂ ------> 2 CaN
Explanation:
An equation is balanced when there is an equal amount of each element on both sides of a reaction. If there is an unequal amount, they can be altered by adding coefficients which modify the amount of an element/molecule. It is important that the coefficients are as small as possible while staying as whole numbers.
1.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
Mg + H₂ -----> MgH
Reactants: 1 magnesium, 2 hydrogen
Products: 1 magnesium, 1 hydrogen
The balanced equation:
2 Mg + H₂ ------> 2 MgH
Reactants: 2 magnesium, 2 hydrogen
Products: 2 magnesium, 2 hydrogen
2.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
K + O₂ -----> KO
Reactants: 1 potassium, 2 oxygen
Products: 1 potassium, 1 oxygen
The balanced equation:
2 K + O₂ -----> 2 KO
Reactants: 2 potassium, 2 oxygen
Products: 2 potassium, 2 oxygen
3.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
K + S -----> KS
Reactants: 1 potassium, 1 sulfur
Products: 1 potassium, 1 sulfur
This equation is already balanced with all the elements/compounds having coefficients of 1.
4.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
Ba + Br₂ -----> BaBr
Reactants: 1 barium, 2 bromine
Products: 1 barium, 1 bromine
The balanced equation:
2 Ba + Br₂ -----> 2 BaBr
Reactants: 2 barium, 2 bromine
Products: 2 barium, 2 bromine
5.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
Ca + N₂ ------> CaN
Reactants: 1 calcium, 2 nitrogen
Products: 1 calcium, 1 nitrogen
The balanced equation:
2 Ca + N₂ ------> 2 CaN
Reactants: 2 calcium, 2 nitrogen
Products: 2 calcium, 2 nitrogen
Which best describes the oxidizing agent in this reaction?
Cl2(aq) + 2Br–(aq) Right arrow. 2Cl–(aq) + Br2(aq)
Bromine (Br) is the oxidizing agent because it gains an electron.
Bromine (Br) is the oxidizing agent because it loses an electron.
Chlorine (Cl) is the oxidizing agent because it gains an electron.
Chlorine (Cl) is the oxidizing agent because it loses an electron.
Answer:
» Chlorine (Cl) is the oxidizing agent because it gains an electron.
Explanation:
Oxidization is the process of losing electrons during an ionic reaction.
In the reaction above, aqueous chlorine captures the electrons of bromide ion hence becoming oxidized. In this sense, since aqueous chlorine is the one gaining electrons, it oxidizes bromide to bromine
[tex]{ \rm{Cl _{2(aq)}+ 2Br {}^{ - } _{(aq)} \dashrightarrow 2Cl {}^{ - } _{(aq)} + Br _{2( aq)}}}[/tex]
Answer:
c
Explanation:
edge 2022
A lighter like the one shown below uses a substance called butane as its fuel. The butane can be burned to create a flame at the tip of the lighter.
a butane lighter
A teacher shows some of her students that the fuel inside the lighter's fuel tank is a liquid. But when she pushes the button that lets the fuel out of the lighter, they observe that it comes out as a gas. She and her students decide to investigate to discover what makes the butane change from a liquid to a gas.
Which step of an investigation would best help them determine what causes the change of state?
A.
calculating the volume of the lighter's fuel tank
B.
comparing lighters that use different kinds of fuel
C.
measuring the pressure inside the lighter's fuel tank
D.
heating butane gas to see if it changes state
Part of the investigation must be measuring the pressure inside the lighter fuel tank.
What is the pressure of a gas?The pressure of gas measures how compact the gas molecules are. We know that the more compacted the gas molecules are, the more likely the gas will exist in the liquid state.
Hence, part of the investigation must be measuring the pressure inside the lighter fuel tank.
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Explain why all the elements of period 3 is placed on the periodic table in period 3
Answer:
3 Electron shell/orbit
Explanation:
the number of shell an element has is what determines the period of that element.
Find the empirical formula for a compound consisting of 63% MN and 37% O.
Answer:
Mn₁O₂
Explanation:
To find the empirical formula, you need to (1) determine how many grams of each element are within the compound, then (2) convert grams to moles (via the atomic masses of each element), and then (3) determine the mole-to-mole ratio of each element.
(Step 1)
Because the percents add to equal 100%, we can say that each percent is the mass of each element.
63% Mn ----> 63 grams Mn
37% O ----> 37 grams O
(Step 2)
We need to convert each mass to moles using the atomic masses. The atomic masses are a ratio comparing the mass of each element per every 1 mole.
Atomic Mass (Mn): 54.983 g/mol
Atomic Mass (O): 15.998 g/mol
63 grams Mn 1 mole
---------------------- x ------------------------- = 1.15 moles Mn
54.983 grams
37 grams O 1 mole
-------------------- x ------------------------ = 2.31 moles O
15.998 grams
(Step 3)
You can find the mole-to-mole ratio of each element in the compound by dividing the calculated mole values by the smallest mole value. In this case, since 1.15 moles was the smallest value calculated, it should be the divisor. The resulting amounts are the subscripts within the empirical formula.
1.15 moles Mn / 1.15 moles = 1 moles Mn
2.31 moles O / 1.15 moles = 2 moles O
Ratio of MnO = 1:2
This make the empirical formula: Mn₁O₂
Nuclear decay occurs according to first-order kinetics. What is the half-life of zinc-65 if a sample decays from 65.0 g to 2.90 g in 3.0 years
Answer:
Explanation:
244 days
will you brainlyest?
The half life of the Zn-65 sample if it decays from 65 g to 2.9 g in 3 years is 1.53 years. This can be obtained using the first order kinetic of nuclear decay.
What is nuclear decay?Nuclear decay is the process by which unstable isotopes of an atom decays by the emission of alpha or beta particles to form stable nuclei. Nuclear decay is a first order reaction and the decay constant k can be written as:
k = 1/t log [no]/[nt]
Where, no and nt be the initial and final amount of the sample.
Given that the initial mass of Zn was 65 g and after 3 years it is 2.90 gram. Thus, decay constant is calculated as :
k = 1/3 yrs log (65/2.9)
= 0.45 yr⁻¹.
Now, the half life of Zn-65 can be calculated as:
t1/2 = 0.693/ k
= 0.693/0.45 yr⁻¹
= 1.53 yrs.
Therefore, the half life of Zn-65 will be 1.53 years.
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What is the oxidation number for S in the compound SO3? (Recall that O has an oxidation number of –2.)
0
+2
+4
+6
The oxidation number for S in the compound SO3 is +6 (option D). Details about oxidation number can be found below.
What is oxidation number?Oxidation number of an element is the hypothetical charge of an atom within a molecule.
The oxidation number of elements in a compound adds up to the overall charge of that compound.
According to this question, O has an oxidation number of -2 in SO3, the oxidation number of S can be calculated as follows:
x - 2(3) = 0
x - 6 = 0
x = 6
Therefore, the oxidation number for S in the compound SO3 is +6.
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The answer is D: 6+
Worked for me on EDGE 2023
What part of the autonomic
nervous system calms you down
after an exciting event?
A. Somatic
B. Temporal lobe
C. Parasympathetic
Answer:
C. Parasympathetic
Explanation:
A compound's molar mass is 240g/mol. its percentage composition is 75% carbon, 5.05% hydrogen and 19.95% oxygen, what is the molecular formula?
explanation please
The molecular formula of the compound is C15H12O3.
What is the molecular formula of the compound?The molecular formula of the compound is determined from the mole ratio of the elements in the compound.
Carbon = 0.75 × 240/12 = 15
Hydrogen = 0.0505 × 240/1 = 12
Oxygen = 0.1995 × 240/16 = 3
Therefore, the molecular formula of the compound is C15H12O3
In conclusion, the molecular formula of the compound is determined from the mole ratio of the elements and their percentage composition.
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point
Which is the correct balanced equation for copper(II) sulfate + aluminium -->
aluminium sulfate + solid copper?
Answer: 2Al(s) + 3CuSO4(aq) → Al2(SO4)3(aq) + 3Cu(s)
Explanation: The quantities of aluminum and copper sulfate used as reactants will be such that the copper sulfate will be in excess. Thus, the aluminum will be the limiting factor in determining the number of moles (gram-atoms) of products that will be formed.
Suppose 110.0 mL110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen fluoride dissolves in water to form 150.0 mL150.0 mL of an aqueous solution. What is the concentration of the resulting hydrofluoric acid
Suppose 110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen fluoride dissolves in water to form 150.0 mL of an aqueous solution. 0.032 M is the concentration of the resulting hydrofluoric acid.
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now write the balanced chemical equation
H₂ + F₂ → 2HF
What is Ideal Gas ?An ideal gas is a gas that obey gas laws at all temperature and pressure conditions. It have velocity and mass but do not have volume. Ideal gas is also called perfect gas. Ideal gas is a hypothetical gas.
It is expressed as:
PV = nRT
where,
P = Pressure
V = Volume
n = number of moles
R = Ideal gas constant
T = temperature
Here,
P = 1 atm [At STP]
V = 110 ml = 0.11 L
T = 273 K [At STP]
R = 0.0821 [Ideal gas constant]
Now put the values in above expression
PV = nRT
1 atm × 0.11 L = n × 0.0821 L.atm/ K. mol × 273 K
[tex]n = \frac{1\ \text{atm} \times 0.11\ L}{0.0821\ \text{L. atm/ K. mol} \times 273\ K}[/tex]
n = 0.0049 mol
How to find the concentration of resulting solution ?To calculate the concentration of resulting solution use the expression
[tex]C = \frac{n}{V}[/tex]
[tex]= \frac{0.0049}{0.15}[/tex]
= 0.032 M
Thus from the above conclusion we can say that Suppose 110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen fluoride dissolves in water to form 150.0 mL of an aqueous solution. 0.032 M is the concentration of the resulting hydrofluoric acid.
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What type of cleaning agent should be used to clean a laminar flow hood?
a. 70% Isopropyl Alcohol.
b. 90% Ethyl Propyl alcohol.
c. 90% Isopropyl Alcohol.
d. 50% Ethyl Propyl alcohol.
The type of cleaning agent that should be used to clean a laminar flow hood is 70% Isopropyl Alcohol.
Isopropyl alcohol is mixed with water for use as a rubbing-alcohol antiseptic. It is also utilized in aftershave creams, hand lotions, and other cosmetics. In enterprise, it is used as a less expensive solvent for cosmetics, drugs, shellacs, and gums, in addition to denaturing ethanol (ethyl alcohol).
Isopropyl alcohol is a colorless, flammable chemical compound with a robust alcoholic smell. As an isopropyl institution related to a hydroxyl group, it's far the handiest example of a secondary alcohol, wherein the alcohol carbon atom is connected to 2 other carbon atoms.
Isopropyl alcohol is pure alcohol and is a colorless liquid with a musty, sharp odor. There are no other components in a bottle of isopropyl alcohol. through assessment, rubbing alcohol consists of isopropyl alcohol among different components, including water. maximum rubbing alcohol manufacturers incorporate 70% isopropyl alcohol.
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What is the empirical formula for a compound if 300. 00 g of it is known to contain 82. 46224 g of molybdenum, 45. 741 g of chlorine and the rest is bromine?
the empirical formula for a compound is Mo2Br5Cl3.
The empirical components of a compound are the best entire quantity ratio of atoms of every detail within the compound. it's miles decided using statistics from experiments and therefore empirical. as an example, the molecular formula of glucose is C 6H 12O 6 however the empirical formulation is CH 2O.
An Empirical formula is the chemical components of a compound that offers the proportions (ratios) of the elements present in the compound however no longer the real numbers or arrangement of atoms. This will be the lowest complete range ratio of the elements within the compound.
The empirical method of a compound gives the only ratio of the range of various atoms gift, while the molecular formula gives the actual range of each distinctive atom found in a molecule. If the components is simplified then it is an empirical components.
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Write the empirical formula for at least four ionic compounds that could be formed from the following ions
Answer:
FeCO₃, Fe(IO₃)₂, Pb(CO₃)₂, Pb(IO₃)₄
Explanation:
Cations (positively charged ions) can only form ionic bonds with anions (negatively charged ions). However, you can't just simply put one cation and one anion together to form a compound. Each compound needs to been neutral, or have an overall charge of 0. When cations and anions do not have charges that perfectly cancel, you need to modify the amount of each ion in the compound.
1.) FeCO₃
-----> Fe²⁺ and CO₃²⁻
-----> +2 + (-2) = 0
2.) Fe(IO₃)₂
-----> Fe²⁺ and IO₃⁻
-----> +2 + (-1) + (-1) = 0
3.) Pb(CO₃)₂
-----> Pb⁴⁺ and CO₃²⁻
-----> +4 + (-2) + (-2) = 0
4.) Pb(IO₃)₄
-----> Pb⁴⁺ and IO₃⁻
-----> +4 + (-1) + (-1) + (-1) + (-1) = 0
[tex]\rm FeCO_3, Fe(IO_3)_2, Pb(CO_3)_2, Pb(IO_3)_4[/tex] are the empirical formula for at least four ionic compounds that could be formed from the given ions.
Ions, which are atoms or molecules with one or more lost or acquired electrons and an electric charge, are bonded together to create ionic compounds, a particular class of chemical complex. A metal cation (a positively charged ion) and a non-metal anion (a negatively charged ion) typically make up these compounds. Ionic bonding is a process that leads to the synthesis of ionic compounds. A non-metal atom becomes a negatively charged anion when it gets one or more electrons, while a metal atom becomes a positively charged cation when it loses one or more electrons.
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Crude petroleum is a mixture of many different components. How might one separate out the components to begin the process of refining petroleum
Fractional distillation is used for the refining of crude petroleum.
How are the components of crude petroleum separated out?Fractional distillation is the procedure used to separate crude oil's numerous constituents.
A mixture is divided into several components, known as fractions, using fractional distillation.A combination of hydrocarbons makes up crude oil. The crude oil evaporates, and in the fractionating column, its vapors condense at various temperatures.The hydrocarbon molecules in each percent have a comparable number of carbon atoms and a comparable range of boiling points.The mixture is placed above a tall fractionating column that has multiple condensers coming off at various heights.The bottom of the column is warm, while the top is cool. High boiling point compounds condense at the bottom, whereas low boiling point substances condense as they ascend.Learn more about fractional distillation here:
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A substance crystallizes with one atom at each corner, one atom on 8 of the edges, and one atom on 6 of the faces. How many atoms are present in one unit cell
The number of atoms in one unit cell with one atom at each corner, one atom on 8 of the edges, and one atom on 6 of the faces are 4.6atoms.
There is one atom at each corner and there are 8 corners in a unit cell, so there is one atom in each of the eight corners.
Therefore, the number of atom from corners = 1 x 1/8 = 1atom
There are 12 edges, since there are one atom on 8 of the edges the number of atom = 1 x 8/12 = 0.6atom
There is one atom at each face and there are 6 faces in a unit cell, each atom shares two face.
Therefore, the number of atoms on face = 2 x 1/6 = 3
Total number of atoms in one unit cell = 1 + 0.6 + 3 = 4.6atoms
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Hydrocarbons (typically petroleum products), which separate in water and have a Specific Gravity less than one, represents a significant hazard to firefighters. Why
Hydrocarbons (typically petroleum products), which separate in water and have a Specific Gravity of less than one, represent a significant hazard to firefighters. Why?
In water, hydrocarbons float to the surface. Water has limited impact on Class B Flammable Liquids and Gases fires, unless water is used to supply a Class B foam/water mixture that can slow the spread of flammable vapors and allow extinguishment by excluding oxygen. Hydrocarbons emit flammable vapors with a significant risk of fire.Describe hydrocarbons.Any member of the class of organic chemical compounds known as hydrocarbons only includes the atoms carbon (C) and hydrogen (H). The hydrogen atoms bond to the carbon atoms in a variety of ways to create the compound's structural framework.
What percentage of crude oil is made up of hydrocarbons?Although there could be thousands of different hydrocarbon molecules in a given crude oil, these descriptions only focus on the type of hydrocarbon that predominates in the combination. Typically, each sort of molecule can be found in all naturally occurring crude oils.
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You picked up a dirty test tube with a sticky substance on the outside. You get some of this substance on your hand. What is the first thing you should do
You picked up a dirty test tube with a sticky substance on the outside. You get some of this substance on your hand. The first thing that I should do is wash my hand and then tell the teacher.
Define the test tube.A test tube often referred to as a culture tube or sample tube, is a typical item of lab glassware that is made up of a finger-like length of clear plastic or glass tubing that is open at the top and closed at the bottom. Usually, test tubes are stored on dedicated racks.
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How much more uranium is there diffused in our oceans compared to what we can mine on land?
There is nearly 1000 times more uranium diffused in our oceans as compared to mine on land.
The world ocean contain more than 4 billion metric tons of dissolved uranium . Uranium is removed from ocean by diffusion across the sediment-water interface of organic-rich sediments.
Mining of Uranium on land.Uranium ore is deposits are economically recovered within earth crust. The uranium elements is common elements present in earth crust as it found 40 times more as compare to silver and 500 times more as compare to gold. It can found in everywhere in the rock , soil, river, and ocean.
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A 25.0 mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. What is the [H ] (molarity) before any base is added
0.723 is the [H ] (molarity) before any base is added.
the balanced equation for the acid-base reaction is
KOH + HClO₄ ---> KClO₄ + H₂O
stoichiometry of KOH to HClO₄ is 1:1
The number of HClO₄ moles - 0.723 M / 1000 mL/L x 25.0 mL = 0.0181 mol
Number of KOH moles - 0.27 M/ 1000 mL/L x 80.0 mL = 0.0216 mol
KOH is a strong acid and HClO₄ is a strong base therefore complete dissociation takes place.
the acid reacts with base in a 1:1 molar ratio, there's excess base remaining.
excess OH⁻ ions - 0.0216 - 0.0181 = 0.0035 mol
concentration is calculated as the number of moles/volume
volume of solution - 25.0 + 80.0 = 105.0 mL
[OH⁻] = 0.0035 mol / 0.105 L = 0.033 M
pOH = -log [OH⁻]
pOH = -log(0.033 M)
pOH = 1.48
pH can be calculated by knowing the pOH
pH + pOH = 14
pH = 14 - 1.48 = 12.52
pH = -log [H₃O⁺]
[H₃O⁺] = antilog(-12.52)
[H₃O⁺] = 3.0 x 10⁻¹³ M
0.723 is the [H ] (molarity) before any base is added.
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