Find the molecular formula of each compound:

Question

1. C₆H₇N 186.27 g/mol
2. C₂HCl 241.90 g/ mol
3. C₅H₁₀NS₂ 593.11 g/ mol

not sure what i'm doing wrong :(

Answer 1

Assuming that you are given the empirical formulae, then we proceed as follows:

1.  C₆H₇N 186.27 g/mol

molar mass = 72 + 7 + 14 = 93

186/93 =2

Molecular formula = C₁₂H₁₄N₂

2. C₂HCl 241.90 g/ mol

molar mass = 24 + 1 + 35.5 = 60.5

241.90/60.5 = 4

Molecular formula = C₈H₄Cl₄

3. C₅H₁₀NS₂ 593.11 g/ mol

molar mass = 60 + 10 + 14 + 64 = 148

593.11/148 = 4

C₂₀H₄₀N₄S₈