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प्रश्न
Write the values of:
standard pressure in:
(i) atm
(ii) mm Hg
(iii) cm Hg
(iv) torr
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उत्तर
(i) 1 atmospheric pressure
(ii) 760 mm Hg
(iii) 76 cm of Hg
(iv) 101325760 pascals
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संबंधित प्रश्न
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2 NaOH +CuSO4 Na2SO Cu (OH)2
What is the colour of the precipitate formed?
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?
Concentrated nitric acid oxidizes phosphorous to phosphoric acid according to the following equation :
P + 5HNO3 → H3PO4 + H2O + 5NO2
What will be the volume of steam at the same time measured at 760mm of Hg pressure and 273°C? [H=1, N=14, O=16, P=31]
The gases hydrogen, oxygen, carbon dioxide, sulphur dioxide and chlorine are arranged in order of their increasing relative molecular mass. Given 8 g of each gas at STP, which gas will contain the least number of molecules and which gas the
most?
Solve the following:
The vapour density of a gas is 8. What would be the volume occupied by 24.0 of the gas at STP?
What do you mean by stoichiometry?
How much calcium oxide is obtained by heating 82 g of calcium nitrate? Also, find the volume of NO2 evolved:
\[\ce{2Ca(NO3)2 ->2CaO + 4NO2 + O2}\]
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.
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(S = 32, O = 16)
The equation given below relates the manufacture of sodium carbonate (molecular weight of Na2CO3 = 106).
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- 2NaHCO3→ Na2CO3+H2O + CO2
Equations (1) and (2) are based on the production of 21.2 g of sodium carbonate.
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