7. What rule of thumb is useful for predicting whether one substance will
dissolve in another?

The real answer is keeping the world healthy so we won’t die

C) electrons encircling a nucleus with neutrons and protons

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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.