Question

(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomic mass of aluminium
= 27)?
(c) 10 moles of sodium sulphite (Na, SO)?​

Answer 1

Answer:

Explanation:

{a) 1 mole of nitrogen atoms=1×mass of N=1×14=14 g

(b) 4 moles of aluminium atoms=4×27=108 g

(c) 10 moles of sodium sulphite(Na  

2

​

SO  

3

​

)=10×Mass of Na  

2

​

SO  

3

​

.

Mass of Na  

2

​

SO  

3

​

=2×Mass of Na atom+1×Mass of S atom+3×Mass of O atom

=2×23+1×32+3×16=46+32+48=126 g/mol

∴10 moles of Na  

2

​

SO  

3

​

=10×126=1260 g