C2H2 contain 1) 3 sicma bond 2 pie bond 2) 4sicma bond 1 pie bond 3)5sikma bond 2 pie bond 4) 5 sikma bond 1 pie bond 5) 2 sikma bond 1 pie bond

30litre of li2o is 1.0002mole approximately 1 mole

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.