Home
Class 12
CHEMISTRY
The number of atoms in 52 u of He is:...

The number of atoms in 52 u of He is:

A

`3.1 xx 10^25`

B

`7.8 xx 10^23`

C

`13`

D

`103`

Text Solution

Verified by Experts

The correct Answer is:
D
4 amu of He = 1 atom
53 amu of He ` = 1/4 xx 52 = 13 ` atoms
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTION (LEVEL-III)|5 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTION|15 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTION|15 Videos

  • SOLUTIONS

    MODERN PUBLICATION|Exercise Recent Examination Questions|13 Videos

  • STATES OF MATTER

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIONS|12 Videos

Similar Questions

Explore conceptually related problems

Calculate the number of moles for 52 g of He (finding mole from mass)

he number of atoms in a molecule of the elementary substance is called ___

Calculate the number of He atoms in (i) 52 u, (ii) 52 g, (iii) 52 moles of He. Atomic weight of He is 4u.

The number of atoms in a radioactive sample reduces from 1000 to 100 in two days. Then the number of atoms remaining at the end of four days is

The number of atoms present in 0.5 gram- atoms of Nitrogen is same as the atoms in

The number of atoms touching a particular atom in a crystal is called its ……….

Find the number of g atoms and weight of an element having 2 xx 10^(23) atoms. Atomic mass of element is 32.

In an atom, the mass number of an atom is equal to the number of ____.

The number of nuetrons in _92U^235 nucleus is

MODERN PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY -MULTIPLE CHOICE QUESTION (LEVEL-II)
  1. A given sample of AlCl3 contains 6.02 xx 10^20 Al^(3+) ions. The ...

    Text Solution

    |

  2. What weight of CO(2) will contain same number of oxygen atoms as are p...

    Text Solution

    |

  3. The number of atoms in 52 u of He is:

    Text Solution

    |

  4. If one atom of hydrogen weighs 1.65 xx 10^(-24) g, then mass of one a...

    Text Solution

    |

  5. The volume of one molecule of water is (density of water = 1 g ml^(-1)...

    Text Solution

    |

  6. One mole of hydrogen peroxide (H2O2) has a mass same as that of

    Text Solution

    |

  7. 19.7 kg of gold was recovered from a smuggler. How many atoms of gold ...

    Text Solution

    |

  8. A gaseous mixture contains oxygen and nitrogen in the ratio of 1:4 by ...

    Text Solution

    |

  9. 0.5 mol of BaCl2 is mixed with 0.2 mol of Na3PO4 . The maximum numb...

    Text Solution

    |

  10. 4.0 grams of caustic soda contain

    Text Solution

    |

  11. One litre of a gas at S.T.P. weighs 1.16 g. It can possibly be

    Text Solution

    |

  12. 12 g of magnesium (atomic mass 24) on reacting completely with acid gi...

    Text Solution

    |

  13. If 224 ml of a triatomic gas has a mass of 1 g at N.T.P., then the mas...

    Text Solution

    |

  14. In the final answer of the expression ((29.2 -20.2)(1.79 xx 10^5))/(1....

    Text Solution

    |

  15. If 20.0 g of CaCO3 is treated with 200 g of HCI, how many grams of CO...

    Text Solution

    |

  16. The thickness of Milky way Galaxy is 40 Em. It can be expressed in met...

    Text Solution

    |

  17. The mass of an Al block (in grams) whose dimensions are 2.0 inch x 3....

    Text Solution

    |

  18. The volume of SO2 produced at S.T.P. by the combustion of 50 g of sul...

    Text Solution

    |

  19. What is the number of potassium atoms required to prepare 1 equivalent...

    Text Solution

    |

  20. The total number of valence electrons in 4.2 g of N(3)^(-) ions is ...

    Text Solution

    |