Question

a gaseous hydrocarbon contains 82.76 of carbon. given that vapour density is 30 find its molecular formula​

Answer 1

Answer:

C₄H₁₀

Explanation:

C : H (by mass) = 82. 76 : (100-82.76) = 82.76 : 17.24

C : H (by mole) = 6.8967 : 17.24  = 2 : 5

(C₂H₅)×n = 30 × 2 = 60

►(12×2 + 5) × n = 60

► n =2.07≈ 2

molecular formula =(C₂H₅)×n = C₄H₁₀