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Byju's Answer
Standard X
Chemistry
Mole Concept and Avogadro's Number
The number of...
Question
The number of atoms present in
0.25
moles of hydrogen is:
A
6.022
×
10
23
atoms
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B
12.022
×
10
23
atoms
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C
1.54
×
10
23
atoms
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D
3.0115
×
10
23
atoms
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Solution
The correct option is
D
3.0115
×
10
23
atoms
We know that,
1
molecule of hydrogen contains 2 atoms.
1
mole of
H
2
contains
=
2
×
6.023
×
10
23
atoms
0.25
mole of
H
2
contains
=
0.25
×
2
×
6.023
×
10
23
atoms
=
3.0115
×
10
23
atoms
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0
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Q.
What are the number of moles and the number of H atoms present in
9.033
×
10
23
molecules of water?