25,963 Answered Questions for the topic chemistry

Chemistry Biochemistry

02/17/24

What is the fraction of association?
What is the fraction of association for each potassium propionate solution? The Ka of propanoic acid is 1.34 x 10^-52.00 x 10^-1 M K(C2H5COO2) = ?2.00 x 10^-2 M K(C2H5COO2) = ?2.00 x... more
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Chemistry

02/17/24

Percentage Yield
Gaseous methane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . If 3.56 g of carbon dioxide is produced from the reaction of 1.8 g of methane and 9.6 g of... more
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Chemistry

02/17/24

Solving moles-to-moles limiting reactant problems

Solid aluminum and oxygengas react to form solid aluminum oxide. Suppose you have 5.0 mol of Al and 9.0 mol of O2 in a reactor.Suppose as much as possible of the Al reacts. How much will be left?... more
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Chemistry

02/16/24

Can some1 help me with chem😞
Given N2 + 3F2 —> 2NF3: how many miles of NF3 are produced from 0.15 mol of F2? How many grams of NF3 are produced
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Chemistry Biochemistry

02/16/24

Determine the molar solubility (S) of Zn(CN)2
Determine the molar solubility (S) of Zn(CN)2 in a solution with a pH= 5.53. Ignore activities. The Ksp for Zn(CN)2 is 3.0 x 10^-16. The Ka for HCN is 6.2 x 10^10. please help thank you!
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Chemistry Biochemistry

02/16/24

Complete the mass balance expression for a saturated solution of Ag2CO3. Ignore any subsequent reactions of Ag+.
Please help!
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Chemistry

02/16/24

Calculate the moles of oxygen needed to produce 0.090 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
A major component of gasoline is octane CgH,8. When liquid octane is burned in air it reacts with oxygen (2) gas to produce carbon dioxide gas and water vapor.
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Chemistry

02/16/24

How many moles of CaCl2 will be produced from 1.4 moles of HCl reacting with cslcum hydroxide

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Chemistry

02/16/24

can someone help me with this chemistry problem (solution)
A mixture consists of FeSO4 and Fe2(SO4)3. A 0.1223 g sample of this mixture was dissolved in water and titrated with a 0.00420 M KMnO4 solution. The titration required 18.85 mL of the... more
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Chemistry

02/15/24

Consider the reaction data(keep three sig figs)
Table: T(K) K(s^-1) 225 0.381875 0.857What two points should be plotted to graphically determine the activation energy of this reaction?x1= y1= x2= y2=Determine the rise, run,... more
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Chemistry

02/15/24

What species are present in HNO2?
A bottle in the lab is labeled 0.1M nitrous acid HNO2 (aq). Which of the following species are actually in the solution in this bottle (even if in small amounts)? HNO2 H2O OH- H3O+ NO2- NO3-
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Chemistry

02/15/24

A solution is made using 200.0 mL of methanol (density 0.7920 g/mL) and 789.1 mL of water (density 1.000 g/mL). What is the mass percent of the methanol?
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Chemistry

02/15/24

calculate the equilibrium pressure
Given that [Ni(CO)₄] = 0.200 M at equilibrium for the equation Ni(s) + 4 CO(g) ⇌ Ni(CO)₄(g) Kc = 5.00 × 10⁴ at 25.0 °C calculate the equilibrium pressure (in atm) of CO(g) at 25.0 °C.
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Chemistry

02/15/24

Ethyl chloride, C2H5Cl, is used as a local anesthetic. It works by cooling tissue as it vaporizes; its heat of vaporization is 26.4 kJ/mol. How much heat could be removed by 15.0 g of ethyl chloride?
please show step by step instructions on answer.
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Chemistry

02/15/24

Calculate the solubility of oxygen in water at the top of Mt. Everest where the atmospheric pressure is 0.320 atm.
Calculate the solubility of oxygen in water at the top of Mt. Everest where the atmospheric pressure is 0.320 atm. The mole fraction of O2 in air is 0.209. Assume the kH of O2 is... more
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Chemistry

02/14/24

weak acid pH calculation
H2S (Ka = 1.1 x10 -7 ) is dissolved in water to a concentration of 6.00 g H2S per 100.00 mL of water. Calculate the pH of this solution. Calculate the percent ionization the H2S solution.
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Chemistry

02/13/24

General Chemistry 2 Class
The acid-dissociation constant for hypochlorous acid, HClO, is 3.0 x 10^-8. Calculate the concentration of H3O+, ClO-, and HClO at equilibrium if the initial concentration of the acid is 0.075 M.
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Chemistry

02/13/24

General Chemistry 2 Class
A 0.100 M solution of bromoacetic acid 1BrCH2COOH2 is 13.2% ionized. Calculate [BrCH2COO-], [H+], [BrCH2COOH], and Ka for bromoacetic acid.
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Chemistry

02/13/24

Activation Energy
The rate constant for the reaction of ozone with oxygen atoms was determined at four temperatures. Calculate the activation energy and frequency factor A for the reaction O(g) + O3(g) -> 2 O2(g)... more
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Chemistry

02/13/24

Chemical Kinetics using Integrated Rate Laws
Some reactions are so rapid that they are said to be diffusion-controlled; that is, the reactants react as quickly as they can collide. An example is the neutralization of H3O+ by OH−, which has a... more
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Chemistry

02/13/24

Mass Stoichiometry
N2(g) + 3H2(g) → 2NH3(g) How many moles of NH3 will be produced if 8.00 mol H2 reacts?
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Chemistry

02/12/24

Rate Equation and Rate Law
The rate of the reaction between CO and NO2, CO(g) + NO2(g) → CO2(g) + NO(g), was studied at 540 K starting with various concentrations of CO and NO2, and the data in the table were collected. ... more
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Chemistry

02/12/24

Consider 2.00 mol of an ideal gas with a constant-volume molar specific beat of 12.5 1/(mol-K), an initial

Consider 2.00 mol of an ideal gas with a constant-volume molar specific beat of 12.5 1/(mol-K), an initial temperature of 22 8 °C, and an initial pressure of 5 610 x 10 Pa. The state of the gas is... more
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Chemistry

02/12/24

The molar heat capacity for carbon monoxide at constant volume is

The molar heat capacity for carbon monoxide at constant volume is Cv_m = 20.17 J(K-mol).A 12.00-1. fixed volume flask contains CO(g) at a pressure of 10.00 kPa and a temperature of 25.0 °C.Assuming... more
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Chemistry

02/12/24

Chemistry Question
Given a diprotic acid, H2A, with two ionization constants of Ka1=4.6×10^− 4 and Ka2=5.0×10^−11, calculate the pH for a 0.168M solution of NaHA.
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