Advertisements
Advertisements
Question
Water decomposes to O2 and H2 under suitable conditions as represented by the equation below:
\[\ce{2H2O -> 2H2 + O2}\]
If 2500 cm3 of H2 is produced, what volume of O2 is liberated at the same time and under the same conditions of temperature and pressure?
Solution
\[\ce{2H2O -> 2H2 + O2}\]
2 V 2 V 1 V
From equation, 2 V of water gives 2 V of H2 and 1 V of O2
where 2 V = 2500 cm3
so, volume of O2 liberated = `(1 xx 2500)/2`
= 1250 cm3
APPEARS IN
RELATED QUESTIONS
A cylinder contains 68 g of ammonia gas at STP.
1) What is the volume occupied by this gas?
2) How many moles of ammonia are present in the cylinder?
3) How many molecules of ammonia are present in the cylinder?
[N = 14, H = 1]
The equations given below relate to the manufacture of sodium carbonate (Molecular weight of Na2CO3 = 106).
- \[\ce{NaCl + NH3 + CO2 + H2O -> NaHCO3 + NH4Cl}\]
- \[\ce{2NaHCO3 -> Na2CO3 + H2O + CO2}\]
Equations (1) and (2) are based on the production of 21.2 g of sodium carbonate.
- What mass of sodium hydrogen carbonate must be heated to give 21.2 g of sodium carbonate?
- To produce the mass of sodium hydrogen carbonate calculated in (a), what volume of carbon dioxide, measured at STP, would be required?
The mass of 11.2 litres of a certain gas at s.t.p is 24 g. Find gram molecular mass of the gas
What volume of oxygen at STP is required to affect the combustion of 11 litres of ethylene [C2H4] at 273°C and 380 mm of Hg pressure?
\[\ce{C2H4 + 3O2 → 2CO2 + 2H2O}\]
Calculate the mass and volume of oxygen at S.T.P., which will be evolved on electrolysis of 1 mole (18 g) of water.
The following question refers to one mole of chlorine gas.
What is the volume occupied by this gas at STP?
What volume of hydrogen and oxygen measured at S.T.P. will be required to prepare 1.8 g of water?
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?
Write the value of:
the standard temperature in:
(i) °C
(ii) K
Which of the following would occupy 22.4 litres at S.T.P.?
- 32 g of oxygen gas
- 2 moles of hydrogen gas
- 6.022 × 1023 molecules of ammonia
[Atomic weights: O = 16, H = 1, N = 14]
