Home
Class 11
CHEMISTRY
Air contains 21% of oxygen by volume. Th...

Air contains 21% of oxygen by volume. The number of moles of `O_(2)` present in 5L of air at STP conditions

A

`2.23xx10^(-1)`

B

`4.68xx10^(-4)`

C

`4.68xx10^(-2)`

D

`0.0234`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • PRACTICE PAPER 2

    NCERT FINGERTIPS ENGLISH|Exercise Practice Paper 2|44 Videos

  • PRACTICE PAPER 1

    NCERT FINGERTIPS ENGLISH|Exercise Practice Paper 1|44 Videos

  • PRACTICE PAPER 3

    NCERT FINGERTIPS ENGLISH|Exercise Practice Paper 3|46 Videos

Similar Questions

Explore conceptually related problems

What volume of air at 1 atm and 273K containing 21% of oxygen by volume is required to completely burn sulphur (S_8) present in 200g of sample , which contains 20% inert material which does not burn. Sulphur burns according to the reaction 1/8 S_8(s)+O_2(g)rarrSO_2(g)

What volume of air at 1 atm and 273K containing 21% of oxygen by volume is required to completely burn sulphur (S_8) present in 200g of sample , which contains 20% inert material which does not burn. Sulphur burns according to the reaction 1/8 S_8(s)+O_2(g)rarrSO_2(g)

What volume of air containing 21% of oxygen by volume is required to completely burn 1 Kg of sulphur (S_(8)) which contains 4% incombustible material? Sulphur burns according to the reaction (1)/(2)S_(8)+O_(2) rarr SO_(2)

Number of atoms present in 224 dm^(3) of oxygen gas at STP is :-

The number of gm atoms of oxygen present in 0.2 mole of H_(2)S_(2)O_(8) is.

What volume of air containing 21% oxygen (by volume) is required to completely burn 1 kg of carbon containing 100% combustible substances?

Air contains 21% oxygen by weight. What weight of air is required to burn 200 g of coal which contains only 80% combustible material

Air contains 23 % oxygen and 77 % nitrogen by weight. The percentage of O_(2) by volume is

"x" L of methane gas at STP contains 1.5xx10^(21) molecules. The number of molecules in "x" L of sulphur diocide at STP will be :

Find the no. of moles of O_2 present in 2.20x 10^21 molecules of oxygen gas?

NCERT FINGERTIPS ENGLISH-PRACTICE PAPER 2-Practice Paper 2
  1. The bond order of a molecule is given by

    Text Solution

    |

  2. Permanent hardness is due to presence of soluble salts of Mg and Ca in...

    Text Solution

    |

  3. Mark out the correct increasing order of radius.

    Text Solution

    |

  4. DeltaH("neutralisation") is always

    Text Solution

    |

  5. The pH of blood is

    Text Solution

    |

  6. Which of the following is according to Boyle's law?

    Text Solution

    |

  7. pH of a 1.0xx10^(-8) M solution of HCl is

    Text Solution

    |

  8. The substance used as a adsorbentt in the column

    Text Solution

    |

  9. Elements of group 14 exhibit oxidation state of

    Text Solution

    |

  10. With rise in temperature, viscosity of a liquid

    Text Solution

    |

  11. Air contains 21% of oxygen by volume. The number of moles of O(2) pres...

    Text Solution

    |

  12. The ratio of average speed of an oxygen molcule to the RMS speed of a ...

    Text Solution

    |

  13. The kinetic enerrgy of 4 mole sof nitrogen gas at 127^(@)C is (R=2" ca...

    Text Solution

    |

  14. Out off N(2)O,SO(2),I(3)^(+),I(3)^(-),H(2)O,NO(2)^(-),N(3)^(-), the li...

    Text Solution

    |

  15. In which of the following ionisation processes, the bond order has inc...

    Text Solution

    |

  16. Which of the following structure is correctly drawn according to funda...

    Text Solution

    |

  17. Back bonding in BF(3) does not afect

    Text Solution

    |

  18. Ammonium carbamate when heated tto 200^(@)C gives a mixture of NH(3) a...

    Text Solution

    |

  19. For the reaction, A((g))+2B((g))hArr 3C((g))+3((g)),K(p)=0.05" atm at ...

    Text Solution

    |

  20. Consider the following reaction, (i) CO(3)^(2-)+H(2)OhArrHCO(3)^(-)+...

    Text Solution

    |