1. What is the mass of 10 moles of CO2? 2. How many grams of NaCl are needed to

Question

1. What is the mass of 10 moles of CO2?
2. How many grams of NaCl are needed to make 250 mL of 0.500 M NaCl solution? M=mol/L 1000mL=1L
(Answers for 1 and 2 are 440g and 7.30g so please show me how you got the correct answer) 1. What is the mass of 10 moles of CO2?
2. How many grams of NaCl are needed to make 250 mL of 0.500 M NaCl solution? M=mol/L 1000mL=1L
(Answers for 1 and 2 are 440g and 7.30g so please show me how you got the correct answer)
2. How many grams of NaCl are needed to make 250 mL of 0.500 M NaCl solution? M=mol/L 1000mL=1L
(Answers for 1 and 2 are 440g and 7.30g so please show me how you got the correct answer)

Explanation / Answer

answer:

1) The mass of 1 mole of carbon dioxide, which is a gas, is 44 grams per mole. This is called the molar mass, or molecular weight, of carbon dioxide.

mass of 10 moles of CO2 = 10 mole x 44 g /mole = 440 g

2) Molarity = moles/Ltr of solution

0.5 M = (0.5 moles / 1000 mL) x 250 mL= 0.125 moles

M.wt of NaCl = 58.4 g/mol

0.125 mole x 58.4 g/mol = 7.3 g

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