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The largest number of molecules is in:...

The largest number of molecules is in:

A

34 g of `H_(2)O`

B

28 g of `CO_(2)`

C

46 g of `CH_(3)OH`

D

54g of `N_(2)O_(5)`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) 34 g of `H_(2)O`
`because` 18 g `H_(2)O=6xx10^(23)` molecule
`therefore34g` of `H_(2)O=(6xx10^(23)xx34)/(18)`
`=11.33xx10^(23)` molecules
(b) 28 of `CO_(2)`
`because` 44 g of `CO_(2)=6xx10^(23)` molecules
`therefore` 28 g of `CO_(2)=(6xx10^(23)xx28)/(44)`
`=3.8xx10^(23)` molecules
(c) 46 g of `CH_(3)OH`
`because` 32g of `CH_(3)OH=6xx10^(23)`
molcules
`therefore46g` of `CH_(3)OH=(6xx10^(23)xx46)/(32)`
`=8.625xx10^(23)` molecules
(d) 54 d of `N_(2)O_(5)`
`because 108g` of
`N_(2)O_(5)=6xx10^(23)` molecules
thus, 34 g `H_(2)O` contains the largest number of molecules.
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Knowledge Check

  • The largest number of molecules in

    A
    `36 g` of water
    B
    `28 g` of carbon monoxide
    C
    `46 g` of ethly alcohol
    D
    `54 g` of nitrogen pentoxide

  • The largest number of molecules is present in _____________.

    A
    54 g of nitrogen tetroxide
    B
    28 g of carbon dioxide
    C
    36 of water
    D
    46 g of ethyl alcohol

  • Which of the following contains the largest number of molecules?

    A
    0.2 mole of `H_2`
    B
    8.0 g of `H_2`
    C
    17 g of `H_2O`
    D
    6.0 g of `CO_2`

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