How many molecules are in 3.0 moles of carbon dioxide?

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$6.066 \times 10^{23}$

$15.066 \times 10^{23}$

$18.066 \times 10^{23}$

None of these

answer is A.

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Detailed Solution

To find a solution to this question, you need to multiply the given number of moles by the Avogadro number. A mole is a non-standardized but international system unit of measuring unit of substance.

Mole is often used as a unit for calculating the amount of substance. The mole of any substance weighs about the same as the molecular weight of a similar substance.

The number of molecules of Avogadro $6.022 \times 10^{23}$ molecules per mole is used to calculate the number of molecules. It represents the number of atoms or molecules or units present in one mole of a substance.

The question was given the number of moles of carbon dioxide. To find the number of molecules, multiply the number of moles by the number of Avogadro.
$3 \times 6.022 \times 10^{23} = 18.066 \times 10^{23}$