Question

5 moles of AB₂ weigh 125 × 10⁻³ kg and 10 moles of A₂B₂ weigh 300 × 10⁻³ kg. The molar mass of A(ᴹA) and molar mass of B(ᴹB) in kg mol⁻¹ are :
(A) ᴹA = 50 × 10⁻³ and ᴹB = 25 × 10⁻³
(B) ᴹA = 10 × 10⁻³ and ᴹB = 5 × 10⁻³
(C) ᴹA = 5 × 10⁻³ and ᴹB = 10 × 10⁻³
(D) ᴹA = 25 × 10⁻³ and ᴹB = 50 × 10⁻³

Answer 1

Answer:

Explanation:

(1 g/mol).

Answer 2

Explanation:

5 moles of AB₂ weigh 125 × 10⁻³ kg and 10 moles of A₂B₂ weigh 300 × 10⁻³ kg. The molar mass of A(ᴹA) and molar mass of B(ᴹB) in kg mol⁻¹ are :

(A) ᴹA = 50 × 10⁻³ and ᴹB = 25 × 10⁻³✓✓

(B) ᴹA = 10 × 10⁻³ and ᴹB = 5 × 10⁻³

(C) ᴹA = 5 × 10⁻³ and ᴹB = 10 × 10⁻³

(D) ᴹA = 25 × 10⁻³ and ᴹB = 50 × 10⁻³