Question

Mass of 5 moles of sodium only​

Answer 1

Mole =given wt./mol.at.

5 =given at./23. ......mol.wt.Na =23

Wt.of Na =~115

Answer 2

Given:

5 moles of a sodium atom.

To find:

The mass.

Solution:

To determine the mass of sodium we have to follow the below steps as follows-

Na atom is an alkali metal having an atomic number of 11.

The atomic mass of the Na atom is 23 amu.

We know that,

One mole of sodium has a mass of 23 amu.

Hence 5 moles of sodium atom have a mass of 23×5=115 amu.

Hence 5 moles of sodium atom have a mass of 115 amu.