Home
Class 11
CHEMISTRY
Oxygen gas is present in a 1L flask ata ...

Oxygen gas is present in a 1L flask ata pressure `7.6xx10^(-10)mm Hg` at `0^(@)C`. Calculate the number of `O_(2)` molecules in the flask.

Text Solution

Verified by Experts

`P=(7.6xx10^(-10))/(760)" "therefore n=(PV)/(RT)=(7.6xx10^(-10)xx1)/(760xx273xx0.082)`
`[V=1L,T=273K,n=4.46xx10^(-14)]`.
Promotional Banner

Topper's Solved these Questions

  • STATES OF MATTER : GASES AND LIQUIDS

    CHHAYA PUBLICATION|Exercise SOLVED NCERT EXERCISE|23 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILL (HOTS) QUESTIONS|20 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    CHHAYA PUBLICATION|Exercise QUESTION-ANSWER ZONE FOR BOARD EXAMINATION|51 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    CHHAYA PUBLICATION|Exercise PRACTICE SET|13 Videos

  • STRUCTURE OF ATOM

    CHHAYA PUBLICATION|Exercise PRACTICE SET|15 Videos

Similar Questions

Explore conceptually related problems

Oxygen gas is present,in a 1.0 L flask at a pressure of 7.6 xx 10^(-10)mm Hg at 27^@C . Calculate the number of oxygen atoms in the "flask

A 2L flask contains 0.4 g O_(2) and 0.6 g H_(2) at 100^(@)C . Calculate the total pressure of the gas mixture in the flask.

A flask of volume 1 litre contains vapour of CH_3OH at a pressure of 1 atm and 25^@C . The flask was then evacuated till the final pressure drop to 10^(-1) mm. Find the number of molecules of CH_3OH left in the flask.

Two flasks of equal volumes have been joined by a narrow tube of negligible volume. Initially both flasks are at 300 K containing 0.60 mol of O_2 gas at 0.5 atm pressure. One of the flasks is then placed in a thermostat at 600 K. Calculate number of moles of _2 2 gas in each flask.

For a van der waals gas, b=5.0xx10^(-2)L*mol^(-1) . What is the diameter of a molecule of this gas?

An electronic vaccum tube is constructed and sealed at 27^@C and 1.2 times 10^-6 cm Hg pressure. The tube has a volume of 100 cm^3 . Calculate the number of gas molecules left in the tube.Avogadro number is 6.02 times 10^23 , and the gas occupies a volume of 22.4 litre at STP.

Calculate the number of O-atoms present inn 112 L of CO_(2) gas at STP.

At STP, O_(2) gas present in a flask was replaced by SO_(2) under similar conditions. The mass of SO_(2) present in the flask will be-

The amount of charge present in a charged body is 3.2xx10^(-17)C . If the charge of an electron be e=-1.6xx10^(-19)C , then calculate the number of deficit of electrons in that body.

Volume of a gas at NTP is 1.12xx10^-7 cc The number of molecules is equal to

CHHAYA PUBLICATION-STATES OF MATTER : GASES AND LIQUIDS-SOLVED WBCHSE SCANNER
  1. Determine the value of gas constant R in SI unit.

    Text Solution

    |

  2. Define critical temperature and critical pressure of a gas.

    Text Solution

    |

  3. Oxygen gas is present in a 1L flask ata pressure 7.6xx10^(-10)mm Hg a...

    Text Solution

    |

  4. (i) Sketch P/T versus T plot for an ideal gas at constant volume. Indi...

    Text Solution

    |

  5. The value of 'R' in J*K^(-1)*mol^(-1) unit is.

    Text Solution

    |

  6. Indicate the correct answer: rate of diffusion of helium gas at consta...

    Text Solution

    |

  7. A 2L flask contains 0.4 g O(2) and 0.6 g H(2) at 100^(@)C. Calculate t...

    Text Solution

    |

  8. (i) The equation of state of a real gas is P(V-b)=RT. Can the gas be l...

    Text Solution

    |

  9. For a fixed mass of an ideal gas draw the following graphs: (i) P/T ...

    Text Solution

    |

  10. (i) State Dalton's law of patial pressure. (ii) What is compressibil...

    Text Solution

    |

  11. (i) Write down van der waals equation for 1 mol of a gas and hence ded...

    Text Solution

    |

  12. (i) Any real gas behaves ideally at very low pressure and high tempera...

    Text Solution

    |

  13. For a definite mass of an ideal gas at constant pressure, V versus 1/P...

    Text Solution

    |

  14. A gas of molar mass 84.5g/mol is enclosed in a flask at 27^(@)C has a ...

    Text Solution

    |

  15. Which gas among the following exhibit maximum critical temperature-

    Text Solution

    |

  16. (i) Explain the nature of the graphs of logP versus log V and logV ver...

    Text Solution

    |

  17. Surface tension of water with increase of temperature may-

    Text Solution

    |

  18. (i) For which property of the liquid the shape of a liquid drop is sph...

    Text Solution

    |

  19. Which of the following is the unit of van der waals gas constant b-

    Text Solution

    |

  20. (i) Write down the van der waals gas equation. (ii) What will be the...

    Text Solution

    |