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The number of meutrons in a drop water (...

The number of meutrons in a drop water `(20 drops =1 mL)` at `4^(@)C`

A

(a)`6.023xx10^(22)`

B

(b)`1.338xx10^(22)`

C

(c )`6.023xx10^(20)`

D

(d)`7.338xx10^(22)`

Text Solution

Verified by Experts

The correct Answer is:
b
Mass of a drop of water `=0.05xx1 g =0.05 g`
Number of moles of water `=0.05/18`
Number of water molecules `=0.05/18xx6.023xx10^(23)`
1 water molecule certain 8 neutrons
`:. .05/18xx6.023xx10^(23)` molecule contain
`(0.05xx8)/18xx6.023xx10^(23)` neutrons
`=0.1338xx10^(23)`
`=1.338xx10^(22)`
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Knowledge Check

  • The number of molecular present in a drop of water, if its volume is 0.05mL, are:

    A
    `1.66xx10^(21)`
    B
    `1.66xx10^(22)`
    C
    `1.66xx10^(23)`
    D
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  • The number of molecules contained in a drop of water with volume 0.5 c.c. at 4^@C is

    A
    `(0.5xx273xx760)/(277xx760)`
    B
    `(0.5xx277xx760)/(273xx760)`
    C
    `(0.5)/(18)xx6.02xx10^(23)`
    D
    `0.5xx6.02xx10^(23)`

  • The number of water molecules present in a drop of water (volume 0.0018 ml) density = 1 gmL^-1 at room temperature is

    A
    `1.084xx10^(18)`
    B
    `6.023xx10^(19)`
    C
    `4.84 xx10^(17)`
    D
    `6.023 xx10^(23)`

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