Question

Calculate the no. of molecules in 80g of oxygen. ​

Answer 1

Answer:

15.055 × $10^{23}$ molecules of Oxygen

Explanation:

32g of Oxygen($O_{2}$) contains 6.022 × $10^{23}$ molecules

Number of molecules in 80g of Oxygen = (80 × 6.022 × $10^{23}$) / 32

                                                 = 2.5  × 6.022 × $10^{23}$

                                                = 15.055 × $10^{23}$ molecules of Oxygen

Answer 2

Answer:

Molecular mass of Oxygen = 32 gm

32 gm Oxygen consists of 6.022 × 10^23 molecules

1 gm Oxygen consists of (6.022 × 10^23)/32 molecules

80 gm Oxygen consists of [(6.022 × 10^23)/32]×80 molecules = 15.055 × 10^23 molecules