03/22/21

Please help with empirical formula.

An unknown compound contains only C,H, and O. Combustion of 5.10g of this compound produced 11.6g CO2 and 4.75g H2O. What is the empirical formula of the unknown compound? Insert subscripts as... more
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03/22/21

Write the acidic equilibrium equation for HPO₄²⁻
Write the acidic equilibrium equation for HPO₄²⁻
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03/22/21

Write the acidic equilibrium equation for HBrO
Write the acidic equilibrium equation for HBrO
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03/22/21

Write the acidic equilibrium equation for HC₂H₃O₂
Write the acidic equilibrium equation for HC₂H₃O₂
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03/22/21

How many molecules of C6H12O6 will be produced from 3.25 x 1025 particles of CO2?

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03/20/21

Chemistry: Ka Calculate from pH
In the laboratory, a general chemistry student measured the pH of a 0.337 M aqueous solution of benzoic acid, C6H5COOH to be 2.324.Use the information she obtained to determine the Ka for this... more
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03/20/21

Chemistry: Ka Calculate from pH
In the laboratory, a general chemistry student measured the pH of a 0.337 M aqueous solution of benzoic acid, C6H5COOH to be 2.324.Use the information she obtained to determine the Ka for this... more
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03/20/21

If the vapor pressure of water is 21.1 mm Hg at the collection temperature, what is the pressure of the collected gas?
Suppose you are collecting a gas over water at 23 oC and obtain a pressure reading of 794.5 mm Hg.If the vapor pressure of water is 21.1 mm Hg at the collection temperature, what is the pressure of... more
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03/20/21

The H 2 produced in a chemical reaction is collected through water in a eudiometer. ?
The H2 produced in a chemical reaction is collected through water in a eudiometer. If the pressure in the eudiometer is 760.0 torr and the vapor pressure of water under the experimental conditions... more
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03/20/21

Chemistry: BCA chemical reactions

Make a BCA table using the chemical reaction below and determine how many molecules of H2Oand O2 would be formed from 2.5x1022 molecules of H2O2.2 H2O2(g) → 2 H2O(g) + O2(g)Calculate the mass of O2... more
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03/20/21

weak acid/ Strong titration questions
Assume that there is half as much sodium hydroxide as acetic acid in a solution. Write the equation for this reaction( give the specific ratio between products and reactants) Is this a buffer... more
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03/19/21

38.7% C, 9.7% H, and 51.6% O. Its molecular mass is 62.0 g/mole. A) Determine the empirical formula of the compound. (3 pts) B) What is the molecular formula of the compound?
A coolant widely used in automobile engines contains 38.7% C, 9.7% H, and 51.6% O. Its molecular mass is 62.0 g/mole.A) Determine the empirical formula of the compound. B) What is the molecular... more
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03/19/21

Help with chemistry textbook problem please? The solutions are provided, but I don’t know the steps.
Consider acetic acid, CH3COOH, the active ingredient in vinegar. It is also responsible for the sour taste of wine when wine gets exposed to air. Bacterial oxidation turns alcohol to... more
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03/19/21

I am not sure how to answer the question below

What is the minimum mass of Na2CO3 (molar mass = 105.990 g/mol) that must be added to 43.4 mL of a 1.0 × 10–4 M AgNO3 solution in order for precipitation to occur? The Ksp of Ag2CO3 is 8.6 × 10–12.... more
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03/19/21

I am not sure how to answer the question below

Calculate the molar concentration of uncomplexed Zn2+(aq) in a solution that contains 0.17 M Zn(NH3)42+ and 0.3775 M NH3 at equilibrium. Kf for Zn(NH3)42+ is .
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03/19/21

acid- and base reaction Need help solving this question

hydrocyanic acid  =  HCN benzoic acid  =  C6H5COOH C6H5COOH is a stronger acid than HCN Write the net ionic equation for the reaction that occurs when equal volumes... more
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03/19/21

Increasing and decreasing volume of a gas. What happens to the pressure?
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03/19/21

Need help solving these two chem questions

1)In the laboratory, a general chemistry student measured the pH of a 0.482 M aqueous solution of hypochlorous acid to be 3.900.Use the information she obtained to determine the Ka for this... more
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03/19/21

A solution is prepared by dissolving 10.00g sucrose (mol wt=343g) in 50g water. The volume of resulting solution is 50mL. Calculate the following.
A. Morality B. Molality C. Mole fraction D. Mass%E. Density of the solution
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03/18/21

Calculate the molar solubility of AgCl in a 4.00−L solution containing 10.0 g of dissolved CaCl2.

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03/18/21

Write the basic equilibrium equation for C₆H₅NH₂
Write the basic equilibrium equation for C₆H₅NH₂
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03/18/21

John learned that a number of polyatomic anions contain element nitrogen . Write the formula of sodium salts of these polyatomic anions and name them.
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03/18/21

Victoria finds that a compound contains an unknown ion X and has the formula XCl. Ion X contains 18 electrons. What is the identity of X? Explain briefly.
Explain briefly.
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03/18/21

CaCO3 + 2 HCl --> CaCl2 + CO2 + H2O. Starting with 20. grams CaCO3 and excess HCl, if only 2.7 g of H2O was produced, what is the % yield of this reaction?
Limestone (CaCO3) dissolves in hydrochloric acid as shown by the equation: CaCO3 + 2 HCl --> CaCl2 + CO2 + H2O. Starting with 20. grams CaCO3 and excess HCl, if only 2.7 g of H2O was produced,... more
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03/18/21

Calorimeter question

A mixture of ammonia, NH3(g), and methane, CH4(g), is burned in an excess of oxygen in a bomb calorimeter. The heat released during this combustion reaction is 1377.65 kJ. If the calorimeter has a... more
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