Answer:
Mass ratio of oxygen = 3 : 1
Explanation:
Let us write the constituent amount of elements that forms the compound.
compound A → 8.45 g of lead and 4.79 g of oxygen
compound B → 4.55 g of lead and 0.77 g of oxygen
Firstly, we have to make the both compound in equal proportions
recall we are comparing the masses of oxygen
compound A → 4.79/8.45 = 0.56686390532 of O/ 1 g of Pb
compound B → 0.77/4.55 = 0.16923076923 of O / 1 g of Pb
Mass ratio of oxygen = compound A(O)/ compound B(O)
Mass ratio of oxygen = 0.56686390532 / 0.16923076923
Mass ratio of oxygen = 3.34965034963 / 1
Mass ratio of oxygen = 3 : 1
