3 years ago

If 42.9 mL of rubbing alcohol is

Chemistry

1 answer:

lisov135 [29]3 years ago

3 0

Answer:

19.8 %

Explanation:

V% = ( V of solute \ 100 ml of solution ) ×100% =

the volume of the solute in 100ml solition = 20 ml

42.9 ml of solute ----------215 ml solution

× ----------- 100 ml solution

42.6 × 100 ml ÷ 215 ml

= 19.8 ml of solute

the V% = (19.8 ÷ 100) ×100% = 19.8%

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