1. Find the molar mass of CO:
* Carbon (C) has a molar mass of 12.01 g/mol
* Oxygen (O) has a molar mass of 16.00 g/mol
* Molar mass of CO = 12.01 g/mol + 16.00 g/mol = 28.01 g/mol
2. Calculate the number of moles of CO:
* Moles = mass / molar mass
* Moles = 3.69 g / 28.01 g/mol = 0.132 mol
3. Convert moles to molecules:
* Avogadro's number tells us there are 6.022 x 10^23 molecules in one mole.
* Number of molecules = moles x Avogadro's number
* Number of molecules = 0.132 mol x 6.022 x 10^23 molecules/mol
* Number of molecules = 7.95 x 10^22 molecules
Therefore, there are approximately 7.95 x 10^22 molecules of carbon monoxide in 3.69 grams.
