The highest number of atoms is present in -
2022
The highest number of atoms is present in -
- A.
4 g He
- B.
46 g Na
- C.
0.40 g Ca
- D.
12 g He
Attempted by 61 students.
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Correct answer: D
Use the formula: number of moles = given mass / molar mass.
4 g He: 4 / 4 = 1 mole
46 g Na: 46 / 23 = 2 moles
0.40 g Ca: 0.40 / 40 = 0.01 mole
12 g He: 12 / 4 = 3 moles
The number of atoms is proportional to the number of moles, so 12 g He contains the highest number of atoms.