How many moles of calcium atoms do you have if you have 7.53 × 10²¹ atoms of calcium. (The mass of one mole of calcium is 40.08 g.)

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.