Which of the following has the highest mass?
`20g` of sulphur
`4mol` of carbon dioxide
`12times10^(24)` atoms of hydrogen
`11.2L` of helium at N.T.P.

What is the molecular mass of substance, each molecule of which contains 4 atoms of carbon and 10 atoms of hydrogen?

Which of the following weighs most (a) 2 gram-atom of oxygen (b) 25 g of Fe (c) 4 xx 10^(23) atoms of carbon (d) 22.4 litres of CO_(2)

Which of the following statement is (are) correct in reference to Bohr's model of hydrogen atom if the mass of an electron because 10 times its original mass ?

A mole of any substance contains 6.023 xx 10^(23) particles. The particles may be atom, molecule ions, electron, proton or neutron. One mole of atom is equal to 1 gm -atom which is equal to atomic weight of atom. 1 gm molecule of any gas is 1 mole of gas whose volume is 22.4 litre at N.T.P. The volume of 3.011 xx 10^(23) atoms of hydrogen gas at N.T.P. is

Calculate number of atoms in each of the following: I. 0.5 mol of nitrogen II. 0.2 mole molecules of hydrogen III. 32 g of sulphur

A vessel of volume 20 L contains a mixture o hydrogen and helium at temperature of 27^(@)C and pressure 2.0 atm The mass of the mixture is 5 g . Assuming the gases to be ideal, the ratio of the mass of hydrogen to heat of helium in the given mixture will be

A vessel of volume 20 L contains a mixture o hydrogen and helium at temperature of 27^(@)C and pressure 2.0 atm The mass of the mixture is 5 g . Assuming the gases to be ideal, the ratio of the mass of hydrogen to heat of helium in the given mixture will be

1.The definition of one atomic mass unit and its value is (a) 1/12^(th) the mass of an atom of oxygen-16, 1amu= 1.6 times 10^(-19)Kg (b) 1/16^(th) the mass of an atom of carbon-12,1amu = 9.1 times 10^(-31)Kg (c) 1/12^(th ) the mass of an atom of carbon-12,1amu = 1.66 times 10^(-27)Kg (d) The mass of helium nucleus, 1amu= 3.2 times 10^(-27)Kg

Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass : S = 32, C = 12 and O = 16 and Avogadro.s Number = 6 xx 10^(23) ]

On dissolving 3.24 g of sulphur in 40 g of benzene, the boiling point of the solution was higher than sulphur? ( K_(b) for benzene = 2.53 K kg mol^(-1) , atomic mass of sulphur = 32 g mol^(-1) ).