The melting point of moleculer hydrogen (H2) is ~14K (-259°C).  Draw a molecular level picture of what molecular hydrogen looks like below this temperature (i. e. as a solid). Why are the molecules of hydrogen sticking together?

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand