Pyroclastic material is classified primarily by the size of the particles. What is the basis for classifying lava? please help !

What is the overall order of reaction for rate = k[no]2[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.

How many moles of al3+ ions are in 1.25 moles of al2o3