Question

For example, if you have 35.43 grams of CO2, how many molecules of CO2 are contained in this sample? (This question does not involve mentioning moles.)

Answer 1

To find the number of molecules of CO2 in a given sample, you need to convert the mass of CO2 to moles and then use Avogadro's number to convert moles to molecules. The molar mass of CO2 is 44.01 g/mol.

Step-by-step explanation:

To find the number of molecules of CO2 in a given sample, you need to convert the mass of CO2 to moles and then use Avogadro's number to convert moles to molecules. The molar mass of CO2 is 44.01 g/mol.

First, convert grams of CO2 to moles using the molar mass:

Moles of CO2 = Mass of CO2 / Molar mass of CO2

Moles of CO2 = 35.43 g CO2 / 44.01 g/mol

Moles of CO2 = 0.804 moles of CO2

Next, use Avogadro's number (6.022 x 1023) to convert moles of CO2 to molecules:

Molecules of CO2 = Moles of CO2 * Avogadro's numbe

Molecules of CO2 = 0.804 moles * 6.022 x 1023 molecules/mol

Molecules of CO2 = 4.85 x 1023 molecules