Given the balanced equation representing a reaction:
4al(s) + 3o2(> 2al2o3(s)
which type of chemical reaction is represented by this equation?
(1) double replacement
(2) single replacement
(3) substitution
(4) synthesis

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

let that person have a turn to speak : )