answer question no. 2 :- (a) and (b) please tomorrow is my chemistry exam...
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Answer:
Ans is 5% and 4.4%
Explanation:
In part (a)
Concentration= Mass of solute/Mass of solution x 100
Concentration= 15/285+15(Mass of water + solute)×100
=15/300 ×100
=5%
In part (b)
Concentration= Volume of solute/Volume of solution x 100
=4/90×100
=0.044444... x 100
=4.444... %
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