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How many moles of Na2CO3 are there in 10.0 L of 2.0 M soluton? Hint: 1. Molarity = moles of the salt (plug in the givens, and find the number of moles) L solution 6. How many moles of Na2CO3 are in 10.0 mL of a 2.0 M solution? Hint: 1. Convert mL to L 2. Molarity = moles of the salt (plug in the givens, and find the number of moles) L solution 7. How many moles of NaCl are contained in 100.0 mL of a 0.20 M solution? Hint: 1. Convert mL to L 2. Molarity = moles of the salt (plug in the givens, and find the number of moles) L solution 8. What mass (in grams) of NaCl would be contained in problem 7? Hint: Convert the moles in problem 7 to grams 9. What mass (in grams) of H2SO4 would be needed to make 750.0 mL of 2.00 M solution? Hint: 1. Convert mL to L 2. Solve for the number of moles 3. Convert moles to grams 10. What volume (in mL) of 18.0 M H2SO4 is needed to contain 2.45 g H2SO4? Hint: 1. Convert grams to moles 2. Solve for molarity 3. Convert L to mL 11. What volume (in mL) of 12.0 M HCl is needed to contain 3.00 moles of HCl? Hint: 1. Solve for molarity 2. Convert L to mL 12. How many grams of Ca(OH)2 are needed to make 100.0 mL of 0.250 M solution? Hint: 1. Convert mL to L 2. Solve for the number of moles 3. Convert moles to grams 13. What is the molarity of a solution made by dissolving 20.0 g of H3PO4 in 50.0 mL of solution? Hint: 1. Convert grams to moles 2. Convert ml to L 3. Solve for the number of moles 14. What mass (in grams) of KCl is there in 2.50 liters of 0.50 M KCl solution? Hint: 1. Solve for the number of moles 2. Convert moles to grams 15. What is the molarity of a solution containing 12.0 g of NaOH in 250.0 mL of solution? Hint: 1. Convert grams to moles 2. Convert mL to L 3. 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