Calculate the grams of substance required to prepare 250mL of 5%(wt/vol) NaNO3

Answer 1

5% w/v means 5g NaNO3/100 mL. So wouldn't the amount for 250 mL be 2.5 x that. Or put another way, 5g x (250/100) = ??

Answer 2

12.5

Answer 3

Aren't we supposed to divide the 250ml by 1000?

Answer 4

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