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0.1 mol of a carbonhydrate with empirica...

`0.1 mol` of a carbonhydrate with empirical formula `CH_(2)O` contains `1 g` of hydrogen. What is its molecular formula?

A

`C_(5)H_(10)O_(5)`

B

`C_(3)H_(6)O_(3)`

C

`C_(4)H_(8)O_(4)`

D

`C_(6)H_(12)O_(6)`

Text Solution

Verified by Experts

The correct Answer is:
A
`0.1` mol of carbohydrate contains `1 g H`, thus, `1` mol of carbohydrate will contain `10 g H`. In other words, `1` molecule contains `10 "amu" H`. The only formula that confirms is `C_(5)H_(10)O_(5)`.
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Carbohydrates are compounds containing only carbon, hydrogen and oxygen having the atomic ratio of H : O as 2 : 1 . When heated in the absence of air, these compounds decompose to form carbon and water. a. If 310 g of a carbohydrates leaves a residue of 124 g of carbon on heating in absence of air, whatis the empirical formula of the carbohydrate? If 0.0833 mole of hte carbohydrate contains 1.0 g hydrogen , what is the molecular formula of the carbohydrate?

Knowledge Check

  • 0.1 mole of a carbohydrate with empirical formula CH_(2)O contains 1 g of hydrogen. What is its molecular formula?

    A
    `C_(5)H_(10)O_(5)`
    B
    `C_(6)H_(12)O_(6)`
    C
    `C_(4)H_(8)O_(4)`
    D
    `C_(3)H_(6)O_(3)`

  • 0.0833 mol of carbohydrate of empirical formula CH_(2)O contain 1g of hydrogen . The molecular formula of the carbonydrate is

    A
    `C_(5)H_(10)O_(5)`
    B
    `C_(3)H_(4)O_(3)`
    C
    `C_(12)H_(22)O_(11)`
    D
    `C_(6)H_(12)O_(6)`

  • 0.0833 mol of carbohydrate of empirical formula CH_(2)O contain 1 g of hydrogen. The molecular formula of the carbohydrate is

    A
    `C_(5)H_(10)O_(5)`
    B
    `C_(3)H_(4)O_(3)`
    C
    `C_(12)H_(22)O_(11)`
    D
    `C_(6)H_(12)O_(6)`

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    If empirical formula is CH_(2)O and molar mass is 60 g/mol. What is the molecular formula.

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    The empirical formula of a compound is CH_2O_2 . What could be its molecular formula ?

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