Question

Tell answer please my answer

Answer 1

Use this Formula:-

No.of moles= particles/Avagadro no.......Formula(1)

and

No. of moles= Mass/moler mass.........Formula(2)

Ans. (a)

Na= sodium
Mass of Na=22 u or 22g

Using Formula (2)

No. of moles= 46/22
No. of moles = 23/11

Now formula (2)

No.of moles= particles/Avagadro no.

$23 \div 11 = particl\div 6.022 \times {10}^{23}$

$part. = 6.022 \times {10}^{23} \times 23 \div 11$
$particles = 12.59 \times {10}^{23}$

Do others like this, Using same formulas.




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Answer 2

Answer:

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