Home
Class 11
CHEMISTRY
A quantity of aluminium has a mass of 54...

A quantity of aluminium has a mass of `54.0 g`. What is the mass of the same number of magnesium atoms ?.

A

`12.1 g`

B

`23.3 g`

C

`48 g`

D

`97.2 g`

Text Solution

Verified by Experts

The correct Answer is:
C

Mole of `Al = ("wt")/("At wt")=(54)/(27)=2"mol"`
So wol of `Mg = ("wt")/(24)`
`"wt" = 2 xx 24 = 48 g` .
Promotional Banner

Topper's Solved these Questions

  • MOLE CONCEPT

    ALLEN|Exercise EXERCISE - 02|46 Videos
  • MOLE CONCEPT

    ALLEN|Exercise EXERCISE -03|13 Videos
  • MOLE CONCEPT

    ALLEN|Exercise Exercise - 05(B)|8 Videos
  • IUPAC NOMENCLATURE

    ALLEN|Exercise Exercise - 05(B)|7 Videos
  • QUANTUM NUMBER & PERIODIC TABLE

    ALLEN|Exercise J-ADVANCED EXERCISE|24 Videos

Similar Questions

Explore conceptually related problems

A sample of sodium has a mass of 46g. What is the mass of the same number of calcium atoms as sodium atoms present in given sample ?

A sample of sodium has a mass of 46g. What is the mass of the same number of calcium atoms as sodium atoms present in given sample (a) 46 g (b) 20 g (c) 40 g (d) 80 g

Isotopes have same number of atomic mass

What mass of Ca will have the same number of atoms as in 3.2 g of S ?

In a Regnault's experiment, the mass of a definite volume of a gas was found to be 4.6420 g, whereas the mass of the same volume of hydrogen at the same temperature and pressure was found to be 0.2902 g. Calculate the vapour density and molecular mass of the gas.

The mass of 0.4 mol Ar is 16 g. What is the molar mass of Ar atoms?

Magnalism is an alloy of aluminium and magnesium. What is the percentage of of magnesium in this alloy?

Define atomic number and mass number of an atom.

Chlorophyll, the green colouring matter of plants contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms present in 2.5 g of chlorophyll.

If 103 cm^(3) of aluminium has a mass of 0.280 kg. Find its density in g//cm^(3)

ALLEN-MOLE CONCEPT-EXERCISE - 01
  1. The charge on 1 gram ions of AI^(3+) is .

    Text Solution

    |

  2. In which of the following pairs do 1 g of each have an equal number of...

    Text Solution

    |

  3. A quantity of aluminium has a mass of 54.0 g. What is the mass of the ...

    Text Solution

    |

  4. Which of the following samples contains the largest number of atoms ? ...

    Text Solution

    |

  5. Which of the following contains greatest number of oxygen atoms ? .

    Text Solution

    |

  6. A sample of ammonium phosphate (NH(4))(3) PO(4) contains 3.18 moles of...

    Text Solution

    |

  7. How many moles of electrons weigh one kilogram?

    Text Solution

    |

  8. A compounds was found to contain 5.37% nitrogen. What is the minimum m...

    Text Solution

    |

  9. Under the same conditions, two gases have the same number of molecules...

    Text Solution

    |

  10. Four one litre flaske are separately filled with the gases H(2), He, O...

    Text Solution

    |

  11. The atomic weight of Cu is 63.546. There are only two naturally occurr...

    Text Solution

    |

  12. If the percentage of water of crystallization in MgSO(4) .x H(2)O is 1...

    Text Solution

    |

  13. A pure gas that is 14.3% hydrogen and 85.7% carbon by mass has a densi...

    Text Solution

    |

  14. A certain alkaloid has 70.8% carbon, 6.2% hydrogen, 4.1% nitrogen and ...

    Text Solution

    |

  15. The empirical formula of a compound of molecular mass 120 is CH(2)O. ...

    Text Solution

    |

  16. 0.250g of an element M, reacts with excess fluorine to produce 0.547g...

    Text Solution

    |

  17. A 1000 gram sample of NaOH contains 3 mole of O atoms, what is the % p...

    Text Solution

    |

  18. A 15mL sample of 0.20 M" " MgCl(2) is added to 45ML of 0.40 M AlCl(3) ...

    Text Solution

    |

  19. Mole fraction of ethanol in ethanol water mixture is 0.25. Hence, the ...

    Text Solution

    |

  20. How many moles of Na^(+) ions are in 20mL "of" 0.40" "M " "Na(3)PO(4) ...

    Text Solution

    |