Fill in the following blanks:
(a) 1 mole contains …………. atoms, molecules or ions of a substance.
(b) A mole represents an …….. number of particles of a substance.
(c) 60 g of carbon element are ……… moles of carbon atoms.
(d) 0.5 mole of calcium element has a mass of ……….. .
(e) 64 g of oxygen gas contains …………. Moles of oxygen atoms.
(a) 6.022 × 1023
(b) Avogadro
(c) 5
(d) 20 g
(e) 4