What is the mass in grams of 3.0×10^23 molecules of co2

Convert molecules to mols to grams
molar mass of CO2 is 44.01
22 g of CO2

What are the choices?

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.