How many molecules are in 0.0124 mol of CH2O

The molecules in 0.0124 mol of CH2O: = 0.0746 x 10²³ molecules

Explanation:

Number of molecules can be calculated as ratio of given mass to molecular mass x Avogadro's number.

That is;

Number of molecules = Given mass / molecular mass x Avogadro's number.

Number of molecules = given mass / molecular mass x 6.023 x 10²³

In the above asked question:

The moles of CH₂O = 0.0124 moles

The molecular mass = CH₂O

(atomic mass of C + + atomic mass of hydrogen + atomic mass of O

that is:

12 + 1x 2+16=30

Now, substituting in formula, we get

number of molecules = 0.0124mole x Av. number '

Number of molecules = 0.0124 x 6.022 x 10²³

= 0.0746 x 10²³ molecules