Answer 1

1:1

1 mole of hydrogen ≡ 1 g of hydrogen

1 mole of hydrogen ≡ 6.023 × 10²³ molecules

1 g of hydrogen ≡ 6.023 × 10²³ molecules

2 g of hydrogen ≡ 1.204 × 10²⁴ molecules

1 mole of oxygen ≡ 16 g of oxygen

1 mole of oxygen ≡ 6.023 × 10²³ molecules

16 g of oxygen ≡ 6.023 × 10²³ molecules

32 g of oxygen ≡1.204 × 10²⁴ molecules