Question

2.5 g of sugar is dissolved in 47.5 g of water.calculate its concentration as percent by mass.

Answer 1

Amount of sugar=2.5g
Amount of water=47.5g
Total amount=47.5+2.5=50g
Percent by mass of sugar= 2.5÷50×100
=5℅
So the percent by mass of water =100-5=95℅
Percent of sugar=5℅and per. Of water=95℅

Answer 2

HEY MATE HERE IS YOUR ANSWER

Total amount =2.5 gram + 47.5 gram =50 gram

Mass of solute/Mass of solution ×100 %= Mass by mass %

Percent by mass of sugar =2.5÷50×100=5 percent  

So, percent of mass of water= 100-5= 95 percent

Percent of sugar= 5 percent

            and

percent of water=95 percent

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