Question

3b. which is the correct way to calculate the molar mass of ab₄ if the molar mass of a is 5 g/mol and the molar mass of b is 1 g/mol? (1 point)
○ 1a + b = 5 + 1 = 6 g/mol
○ 4a + 4b = 4(5) + 4(1) = 24 g/mol
○ 1a + 4b = 5 + 4(1) = 9 g/mol
○ 4a + 1b = 4(5) + 1 = 21 g/mol

Explanation:

Step1: Identify formula components

Formula $AB_4$ has 1 A and 4 Bs.

Step2: Calculate molar mass

Molar mass = (1×5) + (4×1) = 9 g/mol.

Answer:

1A + 4B = 5 + 4(1) = 9 g/mol