A chemist determined that a sample rusted piece of metal was 3.78g of Iron and 1.62g of Oxygen. What is the percent of each element in the sample?
1. 57.15% Fe & 42.85 % Ox
2. 65% 1 & 35% 0
3. 70% Fe & 30% 0
4. 91.2% Fe & 8.8% 0
To determine the percent of each element in the sample, you need to calculate the mass of each element and then convert it into a percentage.
Given that the sample contains 3.78g of iron and 1.62g of oxygen, you can calculate the percent of each element as follows:
1. Calculate the total mass of the sample:
Total mass = mass of iron + mass of oxygen
= 3.78g + 1.62g
= 5.4g
2. Calculate the percent of iron in the sample:
Percent of iron = (mass of iron / total mass) * 100
= (3.78g / 5.4g) * 100
≈ 70%
3. Calculate the percent of oxygen in the sample:
Percent of oxygen = (mass of oxygen / total mass) * 100
= (1.62g / 5.4g) * 100
≈ 30%
Therefore, the correct answer is option 3. 70% Fe & 30% O.