If there are 0.064g of theobromine in a 43g chocolate bar, how many moles of theobromine are there?

If the problem is finding the moles of theobromine, then the 43 g chocolate is not really a necessary information. All you have to do is convert 0.064 g of theobromine to moles using molar mass. The molar mass of theobromine is 180.164 g/mol. So,

0.064 g (1 mol / 180.164 g) = 3.6 x10^-4 moles

The answer would be letter A or the first choice :)

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.