Question 9 unsaved how many liters of co(g) at stp are produced when 68.0 g of caco3(s) is heated according to the following equation? caco3(s) cao(s) + co2(g) : 15.2 l 0.679 l 68.0 l 30.4 l

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5