# Answer on Other Chemistry Question for Summer

Question #9196

What is the molarity of a solution if 200. mL of solution contains 5.00 g of Na2CO3?

Expert's answer

n=m/Mr

n=5.00/106=0.047 mol

Molarity is n/1L,so in 200 mL is 0.047 mol

and in 1000 mL (1 L)=0.188 mol

it is (0.188 mol/1000mL) 0.188 M

n=5.00/106=0.047 mol

Molarity is n/1L,so in 200 mL is 0.047 mol

and in 1000 mL (1 L)=0.188 mol

it is (0.188 mol/1000mL) 0.188 M

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