Calculate the mass of 0.1 mole of carbon dioxide.
[Atomic mass: S = 32, C = 12 and O=16 and Avogadro's Number = 6 x 1023]
2.9 g
3.7 g
4.4 g
5.2 g
6.3 g
Mass of 1 mole of CO2 is 44 g
Mass of 0.1 mole of CO2 will be 44 x 0.1 = 4.4 g
Calculate the mass of (i) 1022 atoms of sulphur, (ii) 0.1 mole of carbon dioxide.
[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's Number = 6 × 1023]
Calculate the mass of 1022 atoms of sulphur.
(a)
(i) Calculate the volume of 320 of SO2 at STP. (Atomic mass : S = 32 and O = 16). (ii) State Gay-Lussac's law of combining volume (iii) Calculate the volume of oxygen required for the complete combustion of 8.8 g of propane (C3H8) (Atomic mass; C = 12, 0 = 16, H = 1, Molar volume −22.4dm3
(b)
(i) An organic compound with vapour density = 94 contains C = 12.67% H = 2.13 % and Br = 85.11% Find the molecular formula. [Atomic mass ; C = 12, H = 1, Br = 80] (ii) Calculate the mass of (1) 1022 Atoms of sulphur. (2) 0.1 mole of carbon dioxide. [Atomic mass; S = 32, C = 12 and O = 16 and Avogadro's number =6×1023
Calculate the number of molecules in 12.8 g of sulphur dioxide gas. Take Avogadro's number as 6 × 1023. [S = 32, O = 16]