One mole of H2SO4 = ____ moles of oxygen.
32
16
8
4
A gas cylinder of capacity of 20dm3 is filled with gas 'X' the mass of which is 10g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative mass of the gas is
5
10
15
20
Which of the following contains maximum number of molecules?
1 g CO2
1 g N2
1 g H2
1 g CH4
A sample of CaCO3 contain 3.01 × 1023 ions of Ca2+ and CO32-. The mass of the sample is
100 g
50 g
200 g
5 g
1 mole of water contains 6.022 × 1023 water molecules and weighs
18g
80g
8g
16g
3.42 g of sucrose are dissolved in 18g of water in a beaker. The number of oxygen atom in the solution are
6.68 × 1023
6.09 × 1022
6.022 × 1023
6.022 × 1021
The gas law which relates the volume of a gas to the number of molecules of the gas is
Avogadro's law
Gay Lussac's law
Boyle's law
Charle's law
Which law explains Gay-Lussac's law?
Charles
Boyle
Avogadro
Hunds
Atomic mass of an element expressed in grams is called
atomic mass
Molecular mass
Gram atomic mass
Molar mass
A molecule of CH4 contains hydrogen atoms of
3
2
