Advertisements
Advertisements
प्रश्न
The following experiment was performed in order to determine the formula of a hydrocarbon. The hydrocarbon X is purified by fractional distillation.
0.145 g of X was heated with dry copper (II) oxide and 224 cm3 of carbon dioxide was collected at S.T.P.
Which elements does X contain?
उत्तर
X contains carbon and hydrogen.
APPEARS IN
संबंधित प्रश्न
What is the value of molar volume of a gas at STP?
Fill in the blank
Mass of 22.4 litre of a gas at STP is __________.
Determine the molecular mass of a gas if 5g of it occupy a volume of 4 L at STP.
If 112 cm3 of hydrogen sulphide is mixed with 120 cm3 of chlorine at STP, what is the mass of sulphur formed?
H2S + Cl2 → 2HCI + S
A cylinder contains 68g of ammonia gas at STP
- What is the volume occupied by this gas?
- How many moles of ammonia are present in the cylinder?
- How many molecules of ammonia are present in the cylinder? [N - 14, H - 1]
Complete the following calculations. Show working for complete credit :
If 6 litres of hydrogen and 4 litres of chlorine are mixed and exploded and if water is added to the gases formed, find the volume of the residual gas.
60 cm3 of oxygen was added to 24 cm3 of carbon monoxide and mixture ignited. Calculate the volume of oxygen used up.
How much calcium oxide is obtained by heating 82 g of calcium nitrate? Also, find the volume of NO2 evolved:
\[\ce{2Ca(NO3)2 ->2CaO + 4NO2 + O2}\]
800 cm3 of gas is collected at 650 mm pressure. At what pressure would the volume of the gas reduce by 40% of its original volume, the temperature remaining constant?
A sample of carbon dioxide occupies 30 cm3 at 15°C and 740 mm pressure. Find its volume at STP.