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प्रश्न
Correct the following statement:
The standard temperature is 25°C.
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उत्तर
The standard temperature is 0°C.
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संबंधित प्रश्न
A gas of mass 32 gms has a volume of 20 liters at S.T.P. Calculate the gram molecular weight of the gas.
How much Is Calcium oxide formed when 82g of calcium nitrate is heated? Also, find the volume of nitrogen dioxide evolved :
2Ca(NO3)2 → 2CaO+4NO2+O2
(Ca = 40 , N = 14,O = 16)
What is the volume occupied by 16g of sulphur dioxide. gas at STP?
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.
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)
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?
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?
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
Define S.T.P.
What temperature would be necessary to double the volume of a gas initially at s.t.p. if the pressure is decreased by 50%?
