I need help with this question for chemistry. The enthalpy of reaction is −2202.0 kJ/mol. How much energy (in joules) will be released if 46.78 grams of propane is burned. (Molar mass of propane = 44.11 g/mol).

On a distance vs time graph the line of an object at rest is a

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.

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?