Question

Which of the following statements is/are correct for 80 g of oxygen?

• A. Statement (i) is correct.
• B. Statement (ii) is correct.
• C. Statement (iii) is correct.
• D. Statement (iv) is correct.

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Statement (i) is correct.

B

Statement (ii) is correct.

C

Statement (iii) is correct.

The atomic mass of oxygen is 16 u.
The molecular mass of oxygen = $2\times$ 16 = 32 u

Given mass = 80 g
Number of gram atoms = $\frac{\text{Given mass}}{\text{Gram atomic mass of oxygen}}$ = $\frac{80}{16}$ = $5$
Number of gram molecules = $\frac{\text{Given mass}}{\text{Gram molecular mass of oxygen}}$ = $2.5$