what is the gram formula mass of Li2SO4 ?
To find the gram formula mass of Li2SO4, you need to calculate the sum of the atomic masses of all the atoms in the formula.
Here's how you can find the gram formula mass step by step:
1. Firstly, find the atomic masses of each element in the formula:
- Li (Lithium) has an atomic mass of approximately 6.941 grams/mole.
- S (Sulfur) has an atomic mass of approximately 32.06 grams/mole.
- O (Oxygen) has an atomic mass of approximately 16.00 grams/mole.
2. Next, determine the number of each element in the formula:
- Li2SO4 indicates that there are 2 lithium atoms.
- Sulfur (S) appears once.
- Oxygen (O) appears four times because of the subscript 4.
3. Multiply the atomic masses by the number of atoms for each element:
- For Li: 2 (atoms) x 6.941 (grams/mole) = 13.882 grams/mole.
- For S: 1 (atom) x 32.06 (grams/mole) = 32.06 grams/mole.
- For O: 4 (atoms) x 16.00 (grams/mole) = 64.00 grams/mole.
4. Finally, sum up the results:
Gram formula mass of Li2SO4 = 13.882 + 32.06 + 64.00 = 109.942 grams/mole.
Therefore, the gram formula mass of Li2SO4 is approximately 109.942 grams/mole.