In the equation C H4 + O2 C O2 + H2 O, what are the reactants? O2 C O2
C O2 + H2 O
C H4 + H2 O
C H4 + O2

Which change to the system wood cause the freely-moving piston to lower?

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction