Question

Calculate the number of molecules present in
2.4 moles of carbondioxide, 1.8 moles of oxygen​

Answer 1

Question -

Calculate the number of molecules present in 2.4 moles of carbon dioxide, 1.8 moles of oxygen

Answer -

We know that there are 6.022 × $10^{23}$

molecules in 1 mole of Carbon dioxide.

So the number of molecules in 2.4 moles of Carbon dioxide would be

$2.4\:\times\:6.022\:\times\:10^{23}$

$14.452\:\times\:10^{23}$ molecules

Similarly, we know that there are 6.022 × $10^{23}$

molecules in 1.8 moles of Oxygen.

So the number of molecules in 1.8 moles of oxygen would be

$1.8\:\times\:6.022\:\times\:10^{23}$

$10.839\:\times\:10^{23}$ molecules

Understanding the concept

What is a mole?

A what is the amount of a substance that contains 6.022 x 10 raised to power 23 atoms or molecules. This is also known as Avogadro's number. It is named after the Italian scientist or Amedeo Avogadro.

• A mole is often referred to as a chemist's dozen.
• Number of moles = $\dfrac{Given\:Mass}{Mass\:of\:1\:mole}$
• Number of molecules = No of moles × Avogadro number