Answer:
26.96g
Explanation:
The balanced chemical equation for the reaction would be:-
4Na + O₂ → 2Na₂O
The ratio of sodium to sodium oxide:-
Na : Na₂O
20g : x (mass of sodium oxide, that we have to find)
Find the Mr of Sodium oxide and sodium.
Mr of Na = 23
Mr of Na₂O = (23 × 2) + 16 = 62
Na : Na₂O
20g : x
23 × 4 : 62 × 2
Cross multiply.
20 × 62× 2 = 23 × 4 × x
2480 = 92x
x = 1240 ÷ 23
x = 26.96g
