How much longer can person b spend in the sun wearing spf 15 than person A

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Which three statements represent the benefits of performing experiments using computer simulations?

How many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride