Advertisements
Advertisements
प्रश्न
A flask contains 3.2 g of sulphur dioxide. Calculate the following:
- The moles of sulphur dioxide present in the flask.
- The number of molecules of sulphur dioxide present in the flask.
- The volume occupied by 3.2 g of sulphur dioxide at STP
(S = 32, O = 16)
उत्तर
Molecular mass of SO2 = [32 + 2(16)] = 64 g
64 g of SO2 is equal to 1 mole.
(i) 3.2 of SO2 = `1/64 xx 3.2`
= 0.05 mole
(ii) 1 mole of SO2 = 6.02 × 1023 molecules
∴ 0.05 mole of SO2 = 0.05 × 6.02 × 1023
= 3.01 × 1022 molecules
(iii) 1 mole of SO2 has volume at STP = 22.4 lit.
∴ 0.05 mole of SO2 has volume at STP = 0.05 × 22.4
= 1.12 litres
APPEARS IN
संबंधित प्रश्न
Copper sulphate solution reacts with sodium hydroxide solution to form a precipitate of copper hydroxide according to the equation :
2NaOH + CuSO4 → Na2SO4 + Cu (OH)2 ↓
(i) What mass of copper hydroxide is precipitated by using 200 gm of sodium hydroxide?
[H = 1, O = 16, Na = 23, S = 32, Cu = 64]
(ii) What is the colour of the precipitate formed?
Copper sulphate solution reacts with sodium hydroxide solution to form a precipitate of copper hydroxide according to the equation :
2 NaOH +CuSO4 Na2SO Cu (OH)2
What is the colour of the precipitate formed?
What is the value of molar volume of a gas at STP?
Calculate the volume of air at STP, required to convert 300 mL of sulphur dioxide to sulphur trioxide. Air contains 21% of oxygen by volume.
What volume of hydrogen sulphide at STP will burn in oxygen to yield 12.8g what volume of oxygen would be required for complete combustion?
Ammonia may be oxidized to ni trogen monoxide in the presence of a catalyst according to th e equation as:
4NH3 + 5O2 → 4NO + 6H2O
If 27L of reactants are consumed, what volume of ni trogen monoxide is produced at the same temperature and pressure?
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?
What do you mean by stoichiometry?
A given amount of gas A is confined in a chamber of constant volume. When the chamber is immersed in a bath of melting ice, the pressure of the gas is 100 cmHg.
- What is the temperature when the pressure is 10cmHg?
- What will be the pressure when the chamber is brought to 100°C
From the equation
\[\ce{3Cu + 8HNO3 -> 3Cu(NO3)2 + 4H2O + 2NO}\]
(Atomic mass Cu = 64, H = 1, N = 14, O = 16)
Calculate the volume of nitric oxide at STP that can be collected.
