Question

Calculate the number of moles of 1.2 X10 24(power) atoms of NA.Na is 22.99 amu a) 3.0 x 10^2 mol of NaB) 5.0 Mol of NaC) 2.0 moles of Nad) 0.66 mol of NA

Answer 1

Explanation

Given:

Number of atoms of Na = 1.2x10^24 atoms

Molar mass of Na = 22.99 g/mol

Required: Moles of Na

Solution:

1 mole = 6.022x10^23 atoms

x moles = 1.2x10^24 atoms

Number of moles of Na = (1.2x10^24 atoms/6.022x10^23 atoms) x 1 mol

Number of moles of Na = 2.0 moles

Answer

C) 2.0 moles of Na