Advertisements
Advertisements
प्रश्न
An organic compound contains H = 4.07%, Cl = 71.65% chlorine and remaining carbon. Its molar mass = 98.96. Find its molecular formula.
उत्तर
Empirical formula weight = 12 + (2 × 1) + 35.5
= 49.5
Molar mass = 98.96
n = `"Molar mass"/"Empirical formula mass"`
= `98.96/49.5`
= 2
∴ Molecular formula = 2 [CH2Cl] = C2H4Cl2
संबंधित प्रश्न
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.
If the empirical formula of two compounds is CH and their vapour densities are 13 to 39 respectively, find their molecular formula.
A gas cylinder filled with hydrogen holds 5g of the gas. The same cylinder holds 85 g of gas X under the same temperature and pressure. Calculate the molecular weight of gas X.
112 cm3 of a gaseous fluoride of phosphorus has a mass of 0.63 g. Calculate the relative molecular mass of the fluoride. If the molecule of the fluoride contains only one atom of phosphorus, then determine the formula of the phosphorus fluoride. [ F = 19, P = 31].
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?
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.
On analysis, a substance was found to contain:
C = 54.54%, H = 9.09%, O = 36.36%
The vapour density of the substance is 44, calculate its molecular formula.
