It is known that the ratio of the masses of the elements of copper and oxygen in the formula of a substance
| September 25, 2021 | education
It is known that the ratio of the masses of the elements of copper and oxygen in the formula of a substance is 8: 2. What is the formula and molecular weight of this substance?
Given: Ar (Cu): Ar (O) = 8: 2CuxOy-?
Solution:
Ar (Cu) = 64; Ar (O) = 16
8: 2 = 4: 1 64: 16 = 4: 1
CuO
M (Cuo) = 64 + 16 = 80
Answer: CuO; Mr (CuO) = 80
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