A welding fuel gas contains carbon and hydrogen only. Burning a small sample of î in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. A volume of 10.0 L (measured at STP) of this welding gas is found to weigh 11.6 g. Calculate (i) empirical formula, (ii) molar mass of the gas, and (iii) molecular formula.

A cooking gas contains carbon and hydrogen only. A volume of 11.2 L of this gas is found to weigh 22g at STP. Then the molecular formula of the gas is

An unknown sample weighing 1.5 g was found to contain only Mn and S. The sample was completely reacted with oxygen and it produced 1.22 g of Mn(II) oxide and 1.38 g of SO_(3) .What is the simplest formula for this compound? (MnS)

Real gases behave ideally only at certain conditions. Density of a gas was found to be 5.5 g//L at 2 bar pressure and calculate the molar mass. (R = 0.083 bar L//mol//K)

Real gases behave ideally only at certain conditions. Density of a gas was found to be 5.5 g L at 2 bar pressure. Calculate its molar mass. [R = 0.083 bar L mol^-1 K^-1 ] t=250 degree C

Calculate the total preśsure in a '10 L' cylinder which contains '0: 4 g' of helium, '1.6 g' of oxygen and '1.4 g' of nitrogen at '27^circ C'. Also calculate the partial pressure of helium gas. in the cylinder. Assume ideal behaviour.for gases?

A sample of liquid H_2O of mass 18.0 g is injected into an evacuated 7.6 L flask maintained at 27^@C. If vapour pressure of H_(2)O at 27^@C is 24.63 mm Hg, what weight percentage of the water will be vapourised when the system comes to equilibrium? Assume water vapours behaves as an ideal gas. The volume occupied by the liquid water is negligible compared to the volume of the container:

At 1 atm and 273 K the volume of nitrogen gas required to cover a sample of silica gel, assuming Langinuin monolayer adsorption, is found to be 1.30 cm^3 g^(-1) of the gel. The area occupied by a nitrogen molecule is 0.16 nm^(2) . What is the surface area per gram of silica gel? [Given : N_A = 6 xx 10^(23)]

Choose the incorrect statement from the following. a) 1 mole Hydrogen atom contains 6.022xx10^23 atoms. b) 1 mole oxygen gas contains 2xx6.022xx10^23 atoms. c) Mass of 1 mole of chlorine is 35.5 g. d) Mass of 0.5 mole of water is 18g. e) 1 mole of nitrogen gas contains 22.4L volume at any state. (Hint: Atomic mass H-1, 0-16, 1-35.5,N=14)

Calculate payload of a balloon having volume 100 L. It is filled with He gas at 0.2486 atm pressure and 300 K. Density of air is 1.3 g/litre and mass of material of balloon is 20 g : 810, 930, 1230, 1060