Other Chemistry Answers

How many molecules of hydrogen gas are there in 8.32 g of Hepatanoic acid?

Molar Mass of the Acid = 130.182 g/mol

Molar Mass of Hydrogen = 1.008 g/mol

1. What is the concentration, in g/mL, of a solution made by dissolving 75.0 g of phosphoric acid in 50.0 mL of solution?
2. What mass of NaCl is needed to produce 500 mL of a 2.0 mol/L solution?
3. What is the molarity of a solution that contains 0.350 g of barium fluoride, BaF₂, in 0.50 L of solution?
4. What is the molar concentration of a solution containing 10.0 g of NaOH in 250 mL of solution?
5. What mass of silver nitrate, AgNO₃, is needed to make 0.50 L of a 0.10 mol/L solution?
6. What volume of 1.0 mol/L solution of CuS can be made from 23.9 g of CuS?
7. A 100 mL sample of a 6.0 mol/L solution of H₂SO₄ is diluted to a final volume of 500 mL. What is the concentration of the diluted solution?
8. What volume of a 6.0 M NaOH solution is needed to produce 3.0 L of a 0.1 M solution?
9. Explain the steps you would follow to make 500 mL of a 0.5 mol/L solution of sodium chloride (NaCl) in the lab.

Explain how viscosity is related to the flow and attraction between atoms in a liquid.

Potassium nitrate reacts with carbonic acid to produce potassium carbonate and nitric acid. A chemist adds 15.15 g of potassium nitrate to 0.228 mol of carbonic acid, and gets 8.45 g potassium carbonate. Write a balanced chemical equation, including all the states of matter.  Determine the limiting reactant and the amount of potassium carbonate (in grams) produced. What is the theoretical yield of potassium carbonate? Determine the percent yield of potassium carbonate in this reaction

You have 1.00 mol/L solution of sulfuric acid. Describe how you would use this solution to make 250.0 mL of a 0.500 mol/L solution of sulfuric acid. *Hint: Your answer should include more than just a calculation

Explain why a compound named methene cannot exist.

 It has been suggested that pain results from a change in the pH of solutions that surround nerves in the body. Many irritating insect bites, for example, are acidic. The fluid inside your cells is also slightly acidic. When a cut or a burn releases this fluid, the pain is signalled through your nerve endings. What would you expect to find if you tested the pH of creams and lotions that are used to treat insect bites? Explain our answer.

A sample of argon gas takes up 7 L and has a temperature of 250 K. After being heated to temperature 280K, what is the new volume? (Use V₁/T₁ = V₂/T₂ ... Show the appropriate formula and math work for credit.)

What is the molarity of of 485.0g of Na2CO3 dissolved in 2.5 L of water?

 What volume of a 1.60 mol/L stock solution of calcium chloride would you use to make a 530 mL of a 0.34 mol/L solution?