Q.

15 grams of methyl alcohol is dissolved in 35 grams of water. What is the mass percentage of methyl alcohol in solution?

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a

75%

b

30%

c

70%

d

50%

answer is A.

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Detailed Solution

Total mass of solution = (15 + 35) g = 50 gram

mass percentage of methyl alcohol 

                                                                      =Mass of methyl alcoholMass of solution×100

                                                                   =1550×100=30%

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