Answer: C.X2Y4
Explanation:
Given that :
Compound has the empirical formula :
Empirical formula : CY2
The empirical formula expresses in Lowest term the whole ratio of the compound.
.
Empirical. Formula is usually written as :
XnYn+1
For instance, the ratio of the compound is :
n : n+1
Therefore, in the question:
XY2
Ratio :
X = 1 ; Y = 2 ; 1 /2 ;hence, the possible molecular number :
The possible moleculars are those whose XY mole ratio is 1 : 2
Comparing the ratios :
X2Y8 = 2/8 = 1 :4
ХЗҮЗ = 3/3 = 1 : 1
X2Y4 = 2 /4 = 1: 2
ХЗҮ9 = 3/9 = 1 :3
Hence, the only possible molecular formula is X2Y4
