)calculate the mass of li formed by electrolysis of molten licl by a current of 8.5×104 a flowing for a period of 28 h . assume the electrolytic cell is 84 % efficient. express your answer using two significant figures.

6.94g/mol was wrong

b)what is the minimum voltage required to drive the reaction?

express your answer using two significant figures.

5x10^5 was wrong

60.0 - there are 3 significant numbers

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.

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.