What is the formula used to calculate percent composition of a compound?

The formula for calculating percent composition of a compound focuses on determining the mass percentage of each individual element relative to the total molar mass of the compound. To find the percent composition, the mass of each element present in the compound is taken and divided by the total molar mass of the compound. This quotient is then multiplied by 100% to convert it into a percentage.

This approach allows chemists to understand the relative amount of each element within the compound which is essential for various applications, including stoichiometry, preparation of solutions, and understanding the properties of substances. The total molar mass represents the sum of the masses of all the elements that make up the compound, thereby providing a context for the individual element masses.

The other options provided do not accurately represent this relationship, focusing either on ratios that involve volume rather than mass or incorrect formulas that do not apply to percent composition calculations. This specificity in the approach to percent composition is crucial for accurate chemical analysis and applications in laboratory settings.