How many molecules of CH40 are in 22.0 g of CH40?

4.03 × 10²³ molecules

Explanation:

Given data:

Mass of CH₄O = 22.0 g

Number of molecules = ?

Solution:

Number of moles of CH₄O:

Number of moles = mass/molar mass

Number of moles = 22.0 g/ 33 g/mol

Number of moles = 0.67 mol

Number of molecules:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

0.67 mol  × 6.022 × 10²³ molecules  / 1 mol

4.03 × 10²³ molecules

c. 75.7

i think that is the right

i do not get it   at all