Question

Which among the following contains highest number of atoms ?
8 g of 02
9 g of H20
25 g of CaCO3
10 g of He​

Answer 1

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Q – Which among the following contains highest number of atoms ?

Ans - 10 g of ( He ) Helium will be the right answer .

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• No of atoms 10 gram of helium is containing will be : –

$= \frac{ Given \: mass }{Atomic \: mass \: } \times Avogardo 's \: Constant$

$= \frac{10}{4} \times {6.022 \times 10}^{ \: 23}$

$= 2.5 \times 6.022 \times {10}^{ \: 23}$

$= 15.055 \: \times {10}^{ \: 23} \: No \: of \: Atoms$

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