How many moles and how many atoms of silicon are in the sample weighing 10.53g? The atomic mass of silicon is 28.0855 amu?

[loveydovey360]

[shikharkaushik007]

No. of moles= given mass/molar mass
No. of moles of Si = 10.53/28.0855
=0.3749mols

No. of Si atoms = no. of moles × 6.02×10²³
= 0.3749 × 6.02×10²³
= 2.256898×10²³ atoms

[AtomicCheesing]

Moles = 10.53/28.0855

# of Atoms = (10.53/28.0855)*6.02*10^23