Question

The atomic mass of sodium is 23. The number of moles in 46 g of sodium is__
(1) 1
(2) 2
(3) 2.3
(4) 4.6

Answer 1

Answer:

(1) 1

Explanation: mass=46gm ;molar mass/atomic mass=23

1 mole=23amu

no. mole=mass/molar mass

no. mole=46gm/26amu

no. mole=2

∴ans→2mole contain 46gm of sodium

Answer 2

Answer:

2

Explanation:

number of mole in sodium = 46/23=2