12. 0.36 g of a metal burnt in oxygen yields 0.60 g oxide. The carbonate of the metal contains g 28.57% of the metal. Assuming the validity of the law of definite proportions, determine the weight of the oxide formed by heating 1 g of that carbonate. (0.4769)

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.

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