My theoretical yield of beryllium chloride was 12.4 grams. In a experiment, if my actual yield was 7.8 grams, what was my percent yield?

It conforms what ever surface its in.

The teacher is mostly talking about the distillation of a mixture

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.