Question

How many grams of :
(a) Al are present in 0.2 mole of it,
(b) HCl are present in 0.1 mole of it?
(c) $H_{2}O$ are present in 0.2 mole of it,
(d) $C{O}_2$ is present in 0.1 mole of it?

Answer 1

(a) 1 mole of aluminium has mass = 27 g
So, 0.2 mole of aluminium has mass = 0.2 $\times$ 27 = 5.4 g
(b) 0.1 mole of HCl has mass = 0.1$\times$ 36.5 (mass of 1 mole)
= 3.65 g
(c) 0.2 mole of $H_{2}O$ has mass = 0.2 $\times$ 18 = 3.6 g
(d) 0.1 mole of $C{O}_2$​​​​​​​ has mass = 0.1 $\times$ 44 = 4.4 g