a compound made up of two elements a and b has an empirical formula A2B if the atomic weight of A is 15 and B is 10 and the compound has a vapour density 40 find its molecular formula
Answers
Answer:
A₄B₂
Explanation:
A₂B
atomic weight of A = 15
atomic weight of B = 10
Empirical mass of A₂B = (2×15) + 10
= 30 + 10
= 40g
Vapour Density = molecular mass / 2
molecular mass = 40 × 2
= 80g
[Empirical formula] ₙ = Molecular formula
n = Molecular Mass / Empirical Mass
n = 80 / 40
n = 2
Molecular formula = [Empirical formula] ₙ
= [ A₂B ] ₂
= A₄B₂
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Answer:
A₄B₂
Explanation:
A₂B
atomic weight of A = 15
atomic weight of B = 10
Empirical mass of A₂B = (2×15) + 10
= 30 + 10
= 40g
Vapour Density = molecular mass / 2
molecular mass = 40 × 2
= 80g
[Empirical formula] ₙ = Molecular formula
n = Molecular Mass / Empirical Mass
n = 80 / 40
n = 2
Molecular formula = [Empirical formula] ₙ
= [ A₂B ] ₂
= A₄B₂