Question

a sample of vitamin c is known to contain 2.409 × 10^24 oxygen atoms . how many moles of oxygen atoms are present in the sample class 9 th
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Answer 1

Step-by-step explanation:

given,

particles are 2.409 × 10²⁴

w.k.t(we know that)

$no.of \: moles = \frac{no.of \: prtixles}{avogadro \: number} \\ = \frac{2.409 \times 10^{24} }{6.022 \times 10 ^{23} } = \frac{12045}{3011} \\ = 4.0003 (approx)4$

no of moles present in sample is 4 moles

Answer 2

The moles of Oxygen present in the sample = 4 moles

Explanation:

Given:

A sample of Vitamin C contains $2.049\times 10^{24}$ atoms

To find out:

Moles of Oxygen atoms present in the sample

Solution:

From Avogadro's principle

We know that in one mole of substance the number of atoms present $=6.023\times 10^{23}$

Thus,

$6.023\times 10^{23}$ atoms are present in = 1 mole

$\therefore$ 1 atom is present in = $\frac{1}{6.023\times 10^{23}}$ moles

$\therefore$ 2.049\times 10^{24} atoms are present in

= $\frac{2.049\times 10^{24}}{6.023\times 10^{23}}$ moles

= $4$ moles

Hope this answer is helpful.

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