Question

What is the mass of 1 mole of nitrogen atom , 4 mole of aluminum atoms (atomic mass of aluminium =27 ), 10 mole of sodium sulphate (na2so3)?

Answer 1

Answer:

a) n=m/M

m=n×M. N=14u

m=1×14

m=14

b) n=m/M

m=n×M. Al=27

m=4×27

m=108

c) n=m/M. Na2SO3

m=n×M. 23×2+32+16×3

m=10×126 46+32+48

m=1260.

Answer 2

Question :-

What is the mass of

(a) 1 mole of nitrogen atoms?

(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?

(c) 10 moles of sodium sulphite (Na2S03)?

Answer :-

(a) Mass of 1 mole of nitrogen atoms = 14 g

(b) 4 moles of aluminium atoms

Mass of 1 mole of aluminium atoms = 27 g

∴ Mass of 4 moles of aluminium atoms = 27 x 4 = 108 g

(c) 10 moles of sodium sulphite (Na2SO3)

Mass of 1 mole of Na2SO3 = 2 x 23 + 32 + 3 x 16 = 46 + 32 + 48 = 126 g

∴ Mass of 10 moles of Na2SO3 = 126 x 10 = 1260 g

Plz mrk as brainliest ❤