Question

calculate the number of atoms in 46 gram of sodium atomic mass of sodium is 23

Answer 1

1 mole of sodium is 46/23=2
In 46 gram sodium we have 2 mole of Na

1 mole Na atoms=6.023 multiple by 10 to power 23
So we can say that 2 mole Na have =2 *6.023*10to power 23=
12.046*10 to power 23

Answer 2

no. of atoms = mass of sample/atomic mass
=46gm/23gm per mole (23 amu=23 gram per mole)
=2 mole or 2×6.022×10^23
=12.044×10^23