How many H atoms are in 7.52grams of C3H8?

To determine the number of H atoms in 7.52 grams of C3H8 (propane), we need to use the molar mass and mole ratio.

1. Determine the molar mass of C3H8:
C = 12.01 g/mol
H = 1.01 g/mol

The molar mass of C3H8 = (3 × 12.01 g/mol) + (8 × 1.01 g/mol) = 44.11 g/mol.

2. Calculate the number of moles of C3H8:
moles = mass / molar mass
moles = 7.52 g / 44.11 g/mol ≈ 0.1703 mol

3. Determine the mole ratio of H atoms to C3H8. From the chemical formula, we know that 1 molecule of C3H8 contains 8 H atoms.

4. Calculate the number of H atoms:
Number of H atoms = moles of C3H8 × mole ratio
Number of H atoms = 0.1703 mol × 8 ≈ 1.3624

Therefore, there are approximately 1.36 × 10^24 H atoms in 7.52 grams of C3H8.

To determine the number of H atoms in 7.52 grams of C3H8 (propane), we need to calculate the molar mass of C3H8 and use it to convert grams to moles. Then, we can use the chemical formula to determine the molar ratio of H atoms to moles of C3H8.

The molar mass of C3H8 can be calculated by summing the atomic masses of its constituent atoms:
1 Carbon (C) atom weighs approximately 12.01 g/mol,
8 Hydrogen (H) atoms weigh approximately 1.01 g/mol each.

So, the molar mass of C3H8 is:
(3 * 12.01 g/mol) + (8 * 1.01 g/mol) = 44.1 g/mol

Next, we can calculate the number of moles of C3H8 present in 7.52 grams using the formula:
moles = mass (in grams) / molar mass

moles = 7.52 g / 44.1 g/mol = 0.1702 mol

Now, according to the chemical formula C3H8, each mole of C3H8 contains 8 moles of H atoms. Therefore, we can multiply the number of moles of C3H8 by this ratio to find the number of moles of H atoms:

moles of H atoms = 0.1702 mol * 8 = 1.3616 mol

Finally, to determine the number of H atoms, we need to convert the moles of H atoms to the actual quantity of H atoms by multiplying it by Avogadro's number (6.022 × 10^23 atoms/mol):

number of H atoms = moles of H atoms * Avogadro's number
number of H atoms = 1.3616 mol * (6.022 × 10^23 atoms/mol) = 8.192 × 10^23 H atoms

Therefore, there are approximately 8.192 × 10^23 H atoms in 7.52 grams of C3H8.

mols in 7.52 g C3H8 = grams/molar mass

mols H atoms = 8x that.
# atoms = mols x 6.02E23 = ?