Advertisements
Advertisements
Question
800 cm3 of gas is collected at 654 mm pressure. At what pressure would the volume of the gas reduce by 40% of its original volume, the temperature remaining constant?
Advertisements
Solution
Given: V = 800 cm3
P = 654 mm
P1= ?
V1 = reduced volume = 40% of 800
= `(800 xx 40)/100`
= 320
Net V1 = 800 − 320
= 480 cm3
T = T1
Using the gas equation,
`(PV)/T = (P_1 V_1)/T_1`
`(800 xx 654)/T = (P_1 xx 480)/T_1`
Since T = T1
P1 = `(800 xx 654)/480`
= 1090 mm of Hg.
APPEARS IN
RELATED QUESTIONS
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?
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?
(NH4)2Cr2O7 → N2 + Cr2O3 +4H2O.
What volume of nitrogen at STP, will be evolved when 63g of ammonium dichromate is decomposed?
(H= 1, N = 14, 0 = 16, Cr = 52)
What is the mass of 56 cm3 of carbon monoxide at STP?
(C = 12 ,O = 16)
The equation given below relates the manufacture of sodium carbonate (molecular weight of Na2CO3 = 106).
- NaCl+NH3+ CO2+ H2O→ NaHCO3+NH4Cl
- 2NaHCO3→ Na2CO3+H2O + CO2
Equations (1) and (2) are based on the production of 21.2 g of sodium carbonate.
(a) What mass of sodium hydrogen carbonate must be heated to give 21.2 g of sodium carbonate?
(b) To produce the mass of sodium hydrogen carbonate calculate in (a), what volume of carbon dioxide, measured at S.T.P. would be required?
A sample of carbon dioxide occupies 30 cm3 at 15°C and 740 mm pressure. Find its volume at STP.
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.
60 cm3 of oxygen was added to 24 cm3 of carbon monoxide and mixture ignited. Calculate the volume of carbon dioxide formed.
