Chemistry

Question Analysis
This question involves two core steps: calculating the empirical formula from mass percent composition, then determining the molecular formula using the compound’s molar mass.
The main focus is on finding the whole-number multiplier that scales the empirical formula to the molecular formula.

Key Concept Explanation
1. Empirical formula: Simplest whole-number ratio of atoms in a compound.
2. Molecular formula: , where and must be a positive integer.
3. Molar masses used: , ,

Step-by-Step Solution
1. Assume a 100 g sample
Mass of , ,
2. Convert mass to moles
Moles of
Moles of
Moles of