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80 g of oxygen contains as many atoms as...

80 g of oxygen contains as many atoms as in

A

10 g of hydrogen

B

5 g of hydrogen

C

80 g of hydrogen

D

1 g of hydrogen.

Text Solution

Verified by Experts

The correct Answer is:
B
Moles of oxygen ` = 80/16 = 5 ` mol
No. of atoms of oxygen ` = 5 xx 6.022 xx 10^23 ` atoms
moles of hydrogen in 5g ` 5/1 = 5` mol
No. of atoms of hydrogen ` = 5 xx 6.022 xx 10^23 ` atoms .
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Knowledge Check

  • 30 g of magnesium and 30 g of oxygen are reacted and the residual mixture contains

    A
    60 g of magnesium oxide only
    B
    40 g of magnesium oxide and 20 g of Oxygen
    C
    45 g of magnesium oxide and 15 g of Oxygen.
    D
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    A
    16.2
    B
    17.4
    C
    17
    D
    16.5

  • What weight of CO_(2) will contain same number of oxygen atoms as are present in 3.6 g of water ?

    A
    8.8g
    B
    7.2g
    C
    4.4g
    D
    220g

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