Question

Calculate the number of atoms in 18 g of Carbon-12.​

Answer 1

Answer:

4×10²³

Explanation:

mass of c-12 atom= 12u

molar mass = 12g

given mass =18g

no of moles= given mass/ molar mass=12/18=2/3

number of atoms = avogardo's number * no. of moles

                             =6.023*10²³ * 2/3 = 4*10²³(approx)