% mass w/w means (gsolute/total g)*100 = ?
[17.35/(17.35+x)]*100 =22.5
Solve for x
The 17.35 g of
NaCl
sample was dissolv
ed in an unknown amount of water. All we know is that prepared
solution has 22.5% of
NaCl
.
The mass of water is
_____ g.
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