Test on mole concept

MOLE CONCEPT 1.0g of hydrogen contains 6 ( 1023 atoms. The atomic weight of helium is 4. It follows that the number of atoms in 1g of He is : The number of molecules in 4.25g of ammonia is approximately : The total number of protons, electrons and neutrons in 12g of 126C is : The number of molecules in 27g of water is : The volume of 20g of H2 at STP is : 1g molecular volume of a gas is the volume occupied by : The value of gram molar volume of gas is : 4.4g of CO2 and 2.24 litre of H2 at STP are mixed in a container. The total number of molecules present in the container will be : 20g of an acid furnishes 0.5 moles of H3O+ ions in its aqueous solution. The value of 1g eq. of the acid will be : The atomic weight of a metal (M) is 27 and its equivalent weight is 9, the formula of its chloride will be : One mole of chlorine combines with certain weight of a metal giving 111g of its chloride. The same amount of metal can displace 2g of hydrogen from an acid. The atomic weight of the metal is : The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will be : The simplest formula of a compound containing 50% of element X (at wt. 10) and 50% of element Y (at. Wt. 20) is : An oxide of sulphur contains 50% S. what will be its empirical formula : When 100g of ethylene polymerizes to polyethylene according to the equation, nCH2=CH2 ( –(–CH2–CH2–)n–. The weight of polyethylene produced will be : MOLE CONCEPT 1.0g of hydrogen contains 6 ( 1023 atoms. The atomic weight of helium is 4. It follows that the number of atoms in 1g of He is : The number of molecules in 4.25g of ammonia is approximately : The total number of protons, electrons and neutrons in 12g of 126C is : The number of molecules in 27g of water is : The volume of 20g of H2 at STP is : 1g molecular volume of a gas is the volume occupied by : The value of gram molar volume of gas is : 4.4g of CO2 and 2.24 litre of H2 at STP are mixed in a container. The total number of molecules present in the container will be : 20g of an acid furnishes 0.5 moles of H3O+ ions in its aqueous solution. The value of 1g eq. of the acid will be : The atomic weight of a metal (M) is 27 and its equivalent weight is 9, the formula of its chloride will be : One mole of chlorine combines with certain weight of a metal giving 111g of its chloride. The same amount of metal can displace 2g of hydrogen from an acid. The atomic weight of the metal is : The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will be : The simplest formula of a compound containing 50% of element X (at wt. 10) and 50% of element Y (at. Wt. 20) is : An oxide of sulphur contains 50% S. what will be its empirical formula : When 100g of ethylene polymerizes to polyethylene according to the equation, nCH2=CH2 ( –(–CH2–CH2–)n–. The weight of polyethylene produced will be :