Advertisements
Advertisements
प्रश्न
A compound X consists of 4.8% carbon and 95.2% bromine by mass. If the vapour density of the compound is 252, what is the molecular formula of the compound?
उत्तर
Empirical formula mass = 12 + 3 × 80 = 252 g
Molecular formula mass = 2 × 252(V.D) = 504 g
n = `"Molecular mass"/"Empirical formula mass"`
= `504/252`
= 2
∴ Molecular formula = 2 × C1Br3
= C2Br6
APPEARS IN
संबंधित प्रश्न
A compound has the following percentage composition by mass: carbon 14.4%, hydrogen 1.2% and chlorine 84.5%. The relative molecular mass of this compound is 168, so what is its molecular formula?
A gaseous compound of nitrogen and hydrogen contains 12.5% hydrogen by mass. Find the molecular formula of the compound if its relative molecular mass is 37.
[N = 14, H = 1].
An organic compound with vapour density = 94 contains C = 12.67%, H = 2.13% and Br = 85.11%. Find the molecule formula.
[Atomic mass: C = 12, H = 1, Br = 80]
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 Y is 5 and the compound has a vapour density (V.D.) 25, find its molecular formula.
A gaseous hydrocarbon contains 82.76% of carbon. Given that its vapour density is 29, find its molecular formula.
Barium chloride crystals contain 14.8% water of crystallization. Find the number of molecules of water of crystallization per molecule.
A hydrate of calcium sulphate CaSO4.xH2O contains 21% water of crystallization. Find the value of x.
A metal M forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride (M = 56).
Arrange the following according to the instruction given in bracket:
C2H2, C3H6, CH4, C2H4 (In the increasing order of the molecular weight)
Explain the term molecular formula.
