Question

according to the law of conservation of mass, if an atom of element a has a mass of 2 units, while an atom of element b has a mass of 5 units, what would be the mass of the compound a3b2? a 16 units b 7 units c 11 units d 19 units

Explanation:

Step1: Calculate mass of A in compound

The compound is \(A_3B_2\). Each atom of A has a mass of 2 units and there are 3 atoms of A. So mass of A in the compound is \(3\times2 = 6\) units.

Step2: Calculate mass of B in compound

Each atom of B has a mass of 5 units and there are 2 atoms of B. So mass of B in the compound is \(2\times5=10\) units.

Step3: Calculate total mass of compound

Total mass of compound \(A_3B_2\) is mass of A + mass of B, which is \(6 + 10=16\) units.

Answer:

a. 16 units