Question

How many oxygen atoms are in 4.5 g of H2SO4?

Answer 1

To find the number of oxygen atoms in 4.5g H2SO4, follow these steps:

1. Calculate moles of H2SO4: Moles = mass/molar mass. Molar mass of H2SO4 is (2x1.008)+(32.07)+(4x16.00)=98.08g/mol. Moles = 4.5/98.08 = 0.0459 mol.

2. Moles of O atoms: 0.0459 mol H2SO4 * 4 O atoms/mol = 0.1836 mol O.

3. Number of O atoms: 0.1836 mol * Avogadro's number (6.022 x 10^23) = 1.105 x 10^23 O atoms.