Asked by Kishwa

What mass of KNO3 (MW=101) is needed to prepare 45omL of 0.250 M KNO3 in water?
Answered by DrBob222
How many moles do you want? That;s M x L = ?
Then mol = grams/molar mass.
Answered by Kishwa
Thank you

I get:

37g/200g x 100 = 18.5%
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