Question

Which option is it...

Answer 1

1.4
$1.8 \times {10}^{21}$

Answer 2

The molar mass of glucose is 180mg/mol
You have 0.18g glucose
Moles of glucose = 0.18/180 = 0.001 mol glucose1 mol glucose contains 6.022×10^23 molecules of glucose0.001 mol glucose = 0.001(6.022×10^23) = 6.022×10^20molecules of glucoseGlucose is C6H12O6 - this is 24 atoms
Therefore you have 24×6.022×10^23 =1.45×10^21atoms.