Question

Calculate the grams of substance required to prepare 250mL of 5%(wt/vol) NaNO3
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) = ??
12.5
Aren't we supposed to divide the 250ml by 1000?
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