The chemical equation below is correctly balanced. 4 Al + 3 O2 → 2 Al2O3

How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2?

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

List and describe the neurological effects of the vocs and other air pollutants, as described by dr. theo colborn