Question

11. How many grams are there in
(i) 5 moles of oxygen and
(ii) 10 moles of sodium?
(molar mass of oxygen = 32 g mol-' and molar mass of sodium
= 23 g mol-1)​

Answer 1

Answer:

1. Molecular mass of O2 is 32u

So, molar mass of O2 is 32g

So 32g = 1 mole

So, in 5 mole there are 32 *5= 160g of O2s.

2. Molar mass of sodium = 23

So 23 g= 1 mol

So, in 10 mole of sodium is 23*10= 230g