Question

Calculate the number of moles corresponding to 2.007 x 1023 atoms of helium.

Answer 1

Explanation:

Calculate the number of moles corresponding to 2.007 × 10 23 atoms of helium. He atoms 10 6.022 He mol 1 He atoms 10 2.007 23 23 = 0.333 mol

Answer 2

CORRECT QUESTION

Calculate the number of moles corresponding to 2.007 x 10²³ atoms of helium.

ANSWER

The answer is 0.3 mol.

GIVEN

Number of atoms of Helium = 2.00 × 10²³

TO FIND

Number of moles of Helium.

SOLUTION

We can simply solve the above problem as follows;

We know that,

Number of moles is defined as the amount of atoms/molecules present in a substance.

1 mole of Helium = 6.022 × 10²³ atoms

Applying simple unitary method;

Number of moles in 1 atom of Helium =

$\frac{1}{6.022 \times {10}^{23} }$

Moles of Helium atom comprising 2.00 × 10²³ atoms of Helium =

$\frac{1}{6.022 \times {10}^{23} } \times 2.007 \times 10^{23}$

0.33 moles.

Hence, The answer is 0.3 mol.

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