How many atoms are in .102 mol of calcium

Grams is in 10.00 moles of calcium (Ca) so,The number of atoms can also be calculated using Avogadro's Constant (6.02214179×102)/ one mole of substance.

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.