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2 years ago

How many moles of naf are in 34.2 grams of a 45.5% by mass naf solution?

1 answer:

8 0

<span>% by mass = mass solute x 100 / mass solution

45.5 % = mass solute NaF x 100 / 34.2

mass solute NaF = 34.2 x 45.5 /100=15.6 g

molae solute NaF = 15.6 g ( 1 mol / 41.9887 g)= 0.372</span>

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