Elements $A$ and $B$ form two distinct compounds $AB_3$ and $A_2B_3$. A $0.20$-mole sample of $AB_3$ weighs $22.0\\text{ g}$ and a $0.20$-mole sample of $A_2B_3$ weighs $32.0\\text{ g}$. What are the atomic masses of $A$ and $B$ respectively?

Subject: Chemistry | Topic: Some basic concepts of chemistry | Difficulty: HARD

Options

1. (A) $a = 20\text{ g/mol}, b = 30\text{ g/mol}$
2. (B) $a = 50\text{ g/mol}, b = 20\text{ g/mol}$
3. (C) $a = 20\text{ g/mol}, b = 40\text{ g/mol}$
4. (D) $a = 60\text{ g/mol}, b = 10\text{ g/mol}$

Verified Answer

Option (B): $a = 50\text{ g/mol}, b = 20\text{ g/mol}$

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