Question

Which has the greatest mass? 1 mole Ca 1 mole CO 1 mole O2 1 mole CH4 1 mole NO

Answer 1

Answer: 1 mole of $Ca$ has the greatest mass.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP , contains avogadro's number $(6.023\times 10^{23})$ of particles and weighs equal to the molecular mass of the substance.

1 mole of $Ca$ has a mass of 40 g.

1 mole of $CO$ has a mass of 28 g

1 mole of $O_2$ has a mass of 32 g

1 mole of $CH_4$ has a mass of 16 g.

1 mole of $NO$ has a mass of 30 g.

Thus the greatest mass is of 1 mole of $Ca$