an organic iron compound consisting of Fe, C, H, and O was found to contain 51.043%C, 5.9886%H, 27.17%O, and 15.80%Fe. how many moles of each element are in 100g of the compound
In 100 g sample you will have guess what?
51.043 g C
5.9886 g H
27.17 g O
etc.
Now remember that moles = grams/molar mass.
To find the number of moles of each element in a compound, we need to use the atomic masses of the elements and the percent composition of the compound. We will follow these steps for each element:
1. Convert the mass percentage to grams.
2. Calculate the number of moles using the molar mass.
Let's start by calculating the number of moles for each element:
1. Carbon (C):
- Mass percentage: 51.043%
- Convert the percentage to grams:
- 100g of compound contains 51.043g of carbon.
- The molar mass of carbon is 12.01 g/mol.
- Calculate the number of moles:
- Moles of carbon = (mass of carbon)/(molar mass of carbon) = 51.043g/12.01 g/mol
2. Hydrogen (H):
- Mass percentage: 5.9886%
- Convert the percentage to grams:
- 100g of compound contains 5.9886g of hydrogen.
- The molar mass of hydrogen is 1.008 g/mol.
- Calculate the number of moles:
- Moles of hydrogen = (mass of hydrogen)/(molar mass of hydrogen) = 5.9886g/1.008 g/mol
3. Oxygen (O):
- Mass percentage: 27.17%
- Convert the percentage to grams:
- 100g of compound contains 27.17g of oxygen.
- The molar mass of oxygen is 16.00 g/mol.
- Calculate the number of moles:
- Moles of oxygen = (mass of oxygen)/(molar mass of oxygen) = 27.17g/16.00 g/mol
4. Iron (Fe):
- Mass percentage: 15.80%
- Convert the percentage to grams:
- 100g of compound contains 15.80g of iron.
- The molar mass of iron is 55.85 g/mol.
- Calculate the number of moles:
- Moles of iron = (mass of iron)/(molar mass of iron) = 15.80g/55.85 g/mol
Therefore, the number of moles of each element in 100g of the compound is:
- Moles of carbon = calculated value
- Moles of hydrogen = calculated value
- Moles of oxygen = calculated value
- Moles of iron = calculated value
Please note that the calculated values have not been provided in the question. You need to perform the calculations using the given mass percentages and atomic masses provided in this answer.