According to the law of conservation of matter, which chemical equation represents a possible chemical reaction?
a. c + 2h2 --> ch4
b. 2h2 + o2 --> the
c. 2al2o3 --> 2nq2o
d. n2 + 3h2 --> p4o10

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

Match the name of the following compound:   mgso4  · h2omagnesium sulfate monohydratemagnesium (ii) sulfate monohydratemagnesium (ii) sulfate hydratemagnesium sulfate hydrate

Amixture with the same composition throughout is!