The reaction below shows the decomposition of water into oxygen and hydrogen gas. 2H2O --> 2H2 + O2

Describe how you would determine whether or not this reaction is endothermic.

Which position represents spring in the southern hemisphere? a) b) c) d)

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?

What is the pressure of 0.500 moles of carbon dioxide gas in a 2.5 l tank and at a temperature of 301 k? (r=0.0821 l·atm/mol·k) 3.08 atm 1.2 atm 0.23 atm 4.01 atm 4.94 atm