Home
Class 12
CHEMISTRY
15 g of an unknown molecular substance w...

15 g of an unknown molecular substance was dissolved in 450 g of water. The resulting solution freezes at ` - 0 . 34^(@) C ` . What is them molar ass of the substance ? (`K_(f)` for water = 1. 86 K kg `mol^(-1)`)

Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    MODERN PUBLICATION|Exercise EXERCISE|635 Videos

  • SOLID STATE

    MODERN PUBLICATION|Exercise EXERCISE|525 Videos

  • STRUCTURE OF ATOM

    MODERN PUBLICATION|Exercise EXERCISE|102 Videos

Similar Questions

Explore conceptually related problems

When 36.0 g of a solute having the empirical formula CH_(2)O is dissovled in 1.20 kg of water, the solution freezes at -0.93^(@)C . What is the moleculer formula of the solute ? ( K_(f) = 1.86^(@)C kg mol^(-1) )

18 g of a compound is dissolved in 10 kg of water so that the resulting solution freezes at - 8^(@) C . If K_(f) for water = 1 . 86 K/m . Calculate the molecular mass of the compound

35 g of compound is added in 1 kg of water so that the resulting solution freezes at - 10^(@) C . If K_(f) for water = 1. 86 K/m . Calculate the molecular mass of the compound

A solution containing 12.5 g of a non- electrolyte substance in 175 g of water gave boiling point elevation of 0.70 K. Calculate the molar mass of the substance ( K_b for water = 0.52 K kg mol^(-) ).

1 . 5 of Ba (NO_(3))_(2) dissolved in 100 g of water shows a depression in freezing point equal to 0 . 28^(@)C . What is the percentage dissociation of the salt ? ( K_(f) for water = 1 . 86 K/m and molar mass of Ba (NO_(3))_(2) = 261.)

A solution containing 2.44 g of solute dissolved in 75 g of water boiled at 100.413^@C . What will be the molar mass of the solute?

MODERN PUBLICATION-SOLUTIONS -EXERCISE
  1. A solution containing 0.45 g of a urea in 22.5 g of water gave a boili...

    Text Solution

    |

  2. Caculate the mass of a compound (molar mass=256g mol^-1) to be dissolv...

    Text Solution

    |

  3. 15 g of an unknown molecular substance was dissolved in 450 g of water...

    Text Solution

    |

  4. 1.00g of a non-electrolyte solute dissolved in 50g of benzene lowered ...

    Text Solution

    |

  5. When 2.56g of sulphur was dissolved in 100 g of CS2, the freezing poin...

    Text Solution

    |

  6. How many grams of ethylene glycol (molar mass = 62) should be added to...

    Text Solution

    |

  7. The aqueous solutions containing respectively 7.5 g of urea (molar mas...

    Text Solution

    |

  8. When 36.0 g of a solute having the empirical formula CH(2)O is dissovl...

    Text Solution

    |

  9. In winter, the normal temperature in a Himalayan's valley was found t...

    Text Solution

    |

  10. An aqueous solution freezes at 272.07K, while pure water freezes at 27...

    Text Solution

    |

  11. A solution containing 0.45 g of a urea in 22.5 g of water gave a boili...

    Text Solution

    |

  12. Calculate the temperature at which a solution containing 54 gms of glu...

    Text Solution

    |

  13. in a cold climate water gets frozen causing damage to the radiator of ...

    Text Solution

    |

  14. A solution of sucrose (molar mass= 342gmol^-1) is prepared by dissolvi...

    Text Solution

    |

  15. Osmotic pressure of a solution containing 3.5 g of dissolved protein p...

    Text Solution

    |

  16. The osmotic presure of a solution containing 9.2 g of a substance (mol...

    Text Solution

    |

  17. Calculate the osmotic pressure of a solution obtained by mixing 100 mL...

    Text Solution

    |

  18. 3.0 g of non-volatile solute when dissolve in 1 litre water, shows an ...

    Text Solution

    |

  19. A solution containing 10.2 g of gylcerine per litre is found to be iso...

    Text Solution

    |

  20. Calculate the osmotic pressure of a solution containing 10 gram each o...

    Text Solution

    |