Home
Class 9
CHEMISTRY
What are the percentage compositions of ...

What are the percentage compositions of hydrogen and oxygen in water `(H_(2)O)` ? (H =1 , O = 16)

Text Solution

Verified by Experts

Molecular mass of water , `H_(2) O = 2 + 16 = 18` amu .
Percentage of hydrogen
`H_(2)O` has two atoms of hydrogen
So , mass of hydrogen in `H_(2)O = 2` amu .
Mass of oxygen = 16 amu
`therefore` percentage of hydrogen = `(2)/(18) xx 100 = 11.1`
and percentage of oxygen = `(16)/(18) xx 100 = 88.9` .
Promotional Banner

Topper's Solved these Questions

  • ATOMS , MOLECULES AND IONS

    BHARATI BHAWAN (ENGLISH)|Exercise Pick the correct option|10 Videos

  • ATOMS , MOLECULES AND IONS

    BHARATI BHAWAN (ENGLISH)|Exercise Fill in the blanks|7 Videos

  • ATOMIC STRUCTURE

    BHARATI BHAWAN (ENGLISH)|Exercise D. Long Answer Questions|12 Videos

  • ATOMS, MOLECULES AND IONS

    BHARATI BHAWAN (ENGLISH)|Exercise E. Numericals|6 Videos

Similar Questions

Explore conceptually related problems

The percentage of hydrogen in H_2O is

The percentage by weight of hydrogen in H_(2)O_(2) is

Calculate the mass in grams of 0.2 mole of water (H_(2)O) . ( H = 1 , O = 16 )

Oxidation state of oxygen in H_(2)O_(2) is

Decompoistion of hydrogen peroxide, 2H_(2)O_(2) rarr 2H_(2)O + O_(2) is a …………. .

The percentage composition by mass of a solution is 20% urea (NH_(2) CONH_(2)) , 40% glucose (C_(6) H_(12) O_(6)) , and 40% water (H_(2) O) . Calculate the mole fraction of each component of the solution.

BHARATI BHAWAN (ENGLISH)-ATOMS , MOLECULES AND IONS -Numericals
  1. What are the percentage compositions of hydrogen and oxygen in water (...

    Text Solution

    |

  2. How many moles are there in 5 g of calcium ?

    Text Solution

    |

  3. Calculate the number of moles in the following : (i) 128 g of oxygen...

    Text Solution

    |

  4. What is the number of molecules present in 0.5 mole of hydrogen ?

    Text Solution

    |

  5. What is the mass in grams of 3 moles of N ?

    Text Solution

    |

  6. Calculate the mass of 12.0 xx 10^(14) atoms of hydrogen .

    Text Solution

    |

  7. Calculate the percentage composition of (i) iron in ferric oxide , F...

    Text Solution

    |

  8. If one mole of carbon atoms weighs 12 grams, what is the mass (in gram...

    Text Solution

    |

  9. How many grams of sodium wil have the same number of atoms as 6 grams ...

    Text Solution

    |

  10. Calculate the mass in grams of 0.2 mole of water (H(2)O) . ( H = 1 , O...

    Text Solution

    |

  11. How many moles of calcium carbonate (CaCO(3)) are present in 10 g o...

    Text Solution

    |

  12. Calculate the number of atoms of each element present in 9.8 g of sulp...

    Text Solution

    |

  13. Calculate the number of calcium ions in 5.6 g of calcium oxide . (Ca =...

    Text Solution

    |

  14. What is the percentage composition of the elements in ammonia , NH(3) ...

    Text Solution

    |

  15. 2.0 of a sample of sodium chloride contains 0.785 g of sodium and 1.77...

    Text Solution

    |

  16. In aqueous solution magnesium chloride dissociates into ions as follow...

    Text Solution

    |

  17. Calculate the mass of water required to produce 36 g of glucose during...

    Text Solution

    |