Question

1. choose the best answer. what is used to determine the percent composition of a compound? avogadros number density molar mass mole ratio 2) choose the best answer. a label reads \92% isopropyl rubbing alcohol\ and isopropyl alcohol has a molar mass of 60.1 g/mol. what is the percent composition of this compound? 92% 70% 55% 60%

Explanation:

Step1: Identify Q1 correct concept

Percent composition of a compound is calculated by dividing the total mass of each element in one mole of the compound by the molar mass of the compound, then multiplying by 100%. So molar mass is required for this calculation.

Step2: Analyze Q2 given data

The label directly states the percent composition of isopropyl alcohol in the solution is 92%, which matches one of the options.

Answer:

1. B. molar mass
2. A. 92%