Question

calculate the number of moles and number of molecules present in 0.32g of oxygen

Answer 1

Explanation:

Mass of oxygen = 0.32 g

Molecular mass of oxygen = 32

No. of moles = ?

No. of molecules = ?

Now,

No. of moles = Mass in gram/Molecular mass in gram

                      = 0.32/32

                      = 0.01 mole

Again,

No. of molecules = 6.023×10²³×No.of moles

                             = 6.023×10²³×0.01

                            = 6.023×10²¹ molecules

Answer 2

Answer:

Explanation:

No.of moles = given mass / molar mass

n = 0.32/16

n = 0.02 moles

1 mole of O2 = 6.022* 10²³

0.02 moles of O2 = 0.02* 6.022*10²³

0.12044*10²³

Plzz mark as brainliest if it helped..:-)