What number is required in the blank to balance the reaction, C₃H₆O + 4 O₂ → CO₂ + 3 H₂O ?

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

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.

Ametal with a large number of free flowing electrons most likely has good conductivity

The answer for this is a