How much heat will be released if 30.0 grams of octane (C8H18) is burned in excess oxygen? C8H18+12½ O2 --> 8CO2 + 9H2O ΔH = -5483.4 kJ

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

In a reaction equation, where are the products located? a.) above the arrow b.) to the right of the arrow c.) to the left of the arrow d.) below the arrow