Answer: 1.6221*10^23 atoms
Explanation:
Butane = C4H10
Molar mass = 58g/mol
1 mole of butane has 4 carbon atoms.
% of carbon in 1 mole of C4H10 = 4*12/58 =82.8%
Mass of carbon in 4g of butane = 82.8/100 *4 = 3.312g.
3.312g of carbon is equal to how many moles of carbon?
No.of moles = mass/ molar mass
3.312/12 = 0.276 moles.
Using Avogadro's number,
Number of atoms in any substance = Avogadro's constant * no of moles of that substance
(6.02214*10^23) * 0.276 = 1.6221*10^23 atoms.
