Which of these weighs most? (i) 32 g of oxygen, (ii) 2 g atom of hydro

1.	Which of these weighs most? (i) 32 g of oxygen, (ii) 2 g atom of hydrogen, (iii) 0.5 mole of Fe, (iv) 3.01 × 1023 atoms of carbon.
Answer» (i) 32 g of oxygen weighs most. (ii) 2 g atom of H₂ = 2g (iii) 0.5 mole of Fe = mole × atomic weight = 0.5 × 56 = 28 g (iv) 6.022 × 10²³ = 1 atom of d 3.01 × 10²³ atoms of C = 1/2 × 12 = 6 g.

Which of these weighs most? (i) 32 g of oxygen, (ii) 2 g atom of hydrogen, (iii) 0.5 mole of Fe, (iv) 3.01 × 1023 atoms of carbon.

Answer»

(i) 32 g of oxygen weighs most.

(ii) 2 g atom of H₂ = 2g

(iii) 0.5 mole of Fe = mole × atomic weight = 0.5 × 56 = 28 g

(iv) 6.022 × 10²³ = 1 atom of d 3.01 × 10²³ atoms of C = 1/2 × 12 = 6 g.