In the equation 2 H2 + O2 → 2 H2O, the H2 molecules are and the H2O molecules are .

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Adepositional also feature that forms where a stream enters a lake or an ocean is a

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