A substance,A₂B,has the composition by mass of 60% A and 40% B.What is the composition of AB₂ by mass? A)40% A,60% B B)50% A,50% B C)27% A,73% B D)33% A,67% B E)none of these

Question

Quizplus · Accepted Answer

To find the composition of AB₂ by mass, we need to determine the molar masses of A and B. In A₂B, 2 moles of A contribute 60% of the mass, and 1 mole of B contributes 40%. Therefore, the molar mass of A is 30% of the total molar mass of A₂B, and B is 40%. For AB₂, the composition by mass is calculated as follows: 1 mole of A and 2 moles of B. The percentage of A is (30/110) * 100 = 27%, and B is (80/110) * 100 = 73%.

A Substance,A2B,has the Composition by Mass of 60% a and 40

A Substance,A₂B,has the Composition by Mass of 60% a and 40