Даю 100 балів!!!
1. W (цукру) = 25% = 0,25
m (розчину) = 450г
m (цукру) - ?
m (води) - ?
2. W (Na эSo) = 20% = 0.2
m (розчину) = 300г
m (води) = 100г
W1 (NaSo) - ?
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