Question

Determine the number of moles of compound and the number of moles of each type of atom in each of the following:

a) 2 mol of H₂SO₄
b) 1 mol of NaCl
c) 0.5 mol of C₃H₈
d) 3 mol of CO₂

Answer 1

To find the number of moles of a compound and the moles of each atom, one multiplies the number of moles of compound by the subscript of each element in its chemical formula.

Step-by-step explanation:

To determine the number of moles of a compound and the number of moles of each type of atom within that compound, we apply Avogadro's number (6.022 \u00d7 1023 entities per mole) and the chemical formula of the compound. For example:

a) 2 mol of H2SO4 contains 2 mol of the compound. The number of moles of atoms is 2 mol H2 (4 mol H), 2 mol S, and 2 mol SO4 (8 mol O).

b) 1 mol of NaCl contains 1 mol of the compound. There are 1 mol of Na atoms and 1 mol of Cl atoms.

c) 0.5 mol of C3H8 contains 0.5 mol of the compound. There are 1.5 mol of C atoms and 4 mol of H atoms present.

d) 3 mol of CO2 contains 3 mol of the compound. There are 3 mol of C atoms and 6 mol of O atoms.