Chemistry
A certain gas 'X' occupies a volume of 100 cm3 at S.T.P and weighs 0.5 g. Find it's relative molecular mass.
Related Questions
The equation for the burning of octane is :
2C8H18 + 25O2 ⟶ 16CO2 + 18H2O
(i) How many moles of carbon dioxide are produced when one mole of octane burns ?
(ii) What volume, at s.t.p., is occupied by the number of moles determined in (i) ?
(iii) If the relative molecular mass of carbon dioxide is 44, what is the mass of carbon dioxide produced by burning two moles of octane ?
Define the term Mole.
A gas cylinder contains 24 × 1024 molecules of nitrogen gas. If Avogadro's number is 6 × 1023 and the relative atomic mass of nitrogen is 14, calculate :
(i) Mass of nitrogen gas in the cylinder.
(ii) Volume of nitrogen at STP in dm3
Dilute HCl is reacted with 4.5 moles of calcium carbonate.
Calculate :
(i) The mass of 4.5 moles of CaCO3.
(ii) The volume of CO2 liberated at stp.
(iii) The mass of CaCl2 formed ?
(iv) The number of moles of the acid HCl used in the reaction [relative molecular mass of CaCO3 is 100 and of CaCl2 is 111.]
Calculate the mass of :
(i) 1022 atoms of sulphur.
(ii) 0.1 mole of carbon dioxide.
[S = 32, C = 12 and O = 16 and Avogadro's Number 6 × 1023]