Advertisements
Advertisements
प्रश्न
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)
उत्तर
2Ca(Na3)2 → 2CaO + 4NO2 ↑ + O2
At STP, 1 mole of any gas contains 22.4L
Since, 4 moles of NO are produced,
∴ volume of nitrogen dioxide obtained = 4 x 22.4 = 89.6 L
2 moles of Ca(NO3)2 produces 2 moles of CaO
328 g Ca(NO3)2 produces = 112 g CaO
1 g Ca(NO3)2 will produce = `112/328` g CaO
= 0.34 g CaO
Hence, 82 g of Ca(NO3)2 will produce = 82 x 0.34 = 27.88 g of CaO.
APPEARS IN
संबंधित प्रश्न
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?
Calculate the volume of 320g of SO2 at STP .
(Atomic mass : S = 32 and O = 16)
State your observation of the following case:
When moist starch iodide paper is introduced into chlorine gas.
A cylinder of 20 liters capacity contains gas at 100 atmospheric pressure. How many flasks of 200 cm3capacity can be filled from it at 1-atmosphere pressure, 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
Write the value of:
the standard temperature in:
(i) °C
(ii) K
Write the values of:
standard pressure in:
(i) atm
(ii) mm Hg
(iii) cm Hg
(iv) torr
Correct the following statement:
The standard temperature is 25°C.
Water decomposes to O2 and H2 under suitable conditions as represented by the equation below:
\[\ce{2H2O -> 2H2 + O2}\]
Taking the volume of H2 calculated in 5(b), what changes must be made in kelvin (absolute) temperature to return the volume to 2500 cm3 pressure remaining constant.
60 cm3 of oxygen was added to 24 cm3 of carbon monoxide and mixture ignited. Calculate the volume of carbon dioxide formed.
