how do i calculate the mols of sulfuric acid ?
mols = grams/molar mass
To calculate the number of moles of sulfuric acid, you divide the mass of sulfuric acid by its molar mass. Sulfuric acid (H2SO4) consists of two hydrogen atoms, one sulfur atom, and four oxygen atoms.
Here are the steps to calculate the moles of sulfuric acid:
1. Determine the mass of the sulfuric acid in grams. The mass can be obtained from a chemical formula or given in the question. For example, let's assume you have 50 grams of sulfuric acid.
2. Find the molar mass of sulfuric acid in grams/mol. The molar mass is the sum of the atomic masses of all the atoms in the compound. For sulfuric acid (H2SO4), the molar mass is:
- 2 hydrogen atoms: 2 x 1.01 g/mol = 2.02 g/mol
- 1 sulfur atom: 1 x 32.07 g/mol = 32.07 g/mol
- 4 oxygen atoms: 4 x 16.00 g/mol = 64.00 g/mol
Add up the individual masses to get the molar mass of sulfuric acid:
2.02 g/mol + 32.07 g/mol + 64.00 g/mol = 98.09 g/mol
3. Use the formula: moles (n) = mass (m) / molar mass (M)
- Moles of sulfuric acid = 50 g / 98.09 g/mol
- Moles of sulfuric acid ≈ 0.51 mol
Therefore, in this example, there are approximately 0.51 moles of sulfuric acid.