How many atoms are in 3.50 moles of calcium (Ca)?
there are always 6.02214 x 10^23 (Avogadros number) atoms in a mole. so times this by 3.5
1 mole of Ca has an Avogadro Number of atoms in it. = 6.02 × 10²³3.5 moles would then have: 3.5 × (6.02 × 10²³) = 3.5 × 6.02 × 10²³ = 21.07× 10²³ = 2.107×10²⁴ atoms.
