1.A sample of XH3(g) with a mass of 1.88 g occupies a volume of 550 mL at a pressure of 110 kPa and 28.5 oC. Identify element X. Justify your answer with calculations. 2. Your friend goes with you to the store and buys some hairspray. He looks at the can and asks: “why does it say: do not store in direct sunlight or heat?” Using your knowledge, explain to your friend why the can has this warning.
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How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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.

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?