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A chemist decided to determine the molec...

A chemist decided to determine the molecular formula of an unknown compound. He collects following informations: (P) Compound contains 2:1 H to O atom (number fo atoms).
(Q) Compound has 40% C by mass
(R) Approximate molecular mass of the compound is 178 g.
(S) Compound contains C,H and O only.
What is the % by mass of oxygen in the compound?

A

`53.33%`

B

`88.88%`

C

`33.33%`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
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Knowledge Check

  • A chemist decided to determine the molecular formula of an unknown compound. He collects following informations: (P) Compound contains 2:1 H to O atom (number fo atoms). (Q) Compound has 40% C by mass (R) Approximate molecular mass of the compound is 178 g. (S) Compound contains C,H and O only. What is the empirical formula of the compound?

    A
    `CH_(3)O`
    B
    `CH_(2)O`
    C
    `C_(2)H_(2)O`
    D
    `CH_(3)O_(2)`

  • A chemist decided to determine the molecular formula of an unknown compound. He collects following informations: (P) Compound contains 2:1 H to O atom (number fo atoms). (Q) Compound has 40% C by mass (R) Approximate molecular mass of the compound is 178 g. (S) Compound contains C,H and O only. Which of the following could be molecular formula of compound?

    A
    `C_(6)H_(6)O_(6)`
    B
    `C_(6)H_(14)O_(6)`
    C
    `C_(6)H_(14)O_(12)`
    D
    `C_(6)H_(14)O_(6)`

  • A penta atomic organic compound has a molecular mass of 253. The molecular formula of the compound is

    A
    `CHBr_(3)`
    B
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    C
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    D
    `CHCl_(3)`

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