Advertisements
Advertisements
Question
A compound made up of two elements X and Y has an empirical formula X2Y. If the atomic weight of X is 10 and that of Y is 5 and the compound ha a vapor density 25, find its molecular formula.
Solution
Empirical formula = X2Y
Atomic Weight (X) = 10
Atomic Weight (Y) = 5
Empirical Formula Weght = 2 × 10 + 5 = 25
So, n = `"Molecular weight"/"Empirical formula weight" = (2xx"V.D")/"Empirical formula weight"`
`n = (2 xx 25)/25 = 2`
So Molecular Formula = (X2Y) × 2 = X4Y2
APPEARS IN
RELATED QUESTIONS
Give the empirical formula of C6H6.
Give the empirical formula of: C6H12O6
Give the empirical formula of C2H2
Give the empirical formula of CH3COOH
Calculate the empirical formula of the compound having 37.6% sodium, 23.1% silicon and 39.3% oxygen.(Answer correct to two decimal places) (O = 16, Na = 23, Si = 28)
Explain the term empirical formula.
0.2 g atom of silicon combine with 21.3 g of chlorine. Find the empirical formula of the compound formed.
A compound is formed by 24 g of X and 64 g of oxygen. If the atomic mass of X = 12 and O = 16, calculate the simplest formula of the compound.
A compound has the following percentage composition by mass: carbon 14.4%, hydrogen 1.2% and chlorine 84.5%. Determine the empirical formula of this compound. Work correctly to 1 decimal place. (H = 1; \[\ce{C}\] = 12; \[\ce{Cl}\] = 35.5)
The Empirical formula of an organic compound is CHCl2.
If its relative molecular mass is 168, what is its molecular formula?
[At. Wt. C = 12, H = 1, Cl = 35.5]
