Question

Rust is a compound that is 70.7% iron, and 29.3% oxygen. How many grams of iron, and how many grams of oxygen are there in 680.0 grams of rust?

Answer 1

To find the mass of each component, we multiply the total mass of 680 g by the percentage composition of each component.
If rust is 70.7% iron, then 680.0 g rust * 70.7% = 480.76 g iron.
For the 29.3% oxygen, multiplying 680.0 g rust * 29.3% = 199.24 g oxygen.