Calculate the number of molecules of hydrogen gas present is 2.24dm^3 of a gas (H=1)

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

The table lists pressure and volume values for a particular gas. which is the best estimate for the value of v at p = 7.0 × 103 pascals?

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?