Answer:
Nitrogen,N
Explanation:
We are given;
- Formula of the compound as A₂O
- % of A is 63.7%
- % of Oxygen is 36.3%
We are required to identify A
- First we are going to determine the mass of O in the compound
Atomic mass of O is 16.00 g
Therefore, mass of Oxygen in the compound is 16.00 g
- Second, we can determine the mass of A in the compound
16.00 g = 36.3 %
Thus, mass of A = (16.00 × 63.7%) ÷ 36.3%
= 28.077 g
But there are two atoms of A in the compound
Therefore, Atomic mass of A = 28.077 g ÷ 2
= 14.039 g
= 14.0 g
Thus, the identity of element A is nitrogen, because its atomic number is 14.0067 which is approximately 14.0 g
Hence, identity of element A is Nitrogen (N)
