Four atoms of hydrogen combine with one carbon atom to form CH,, but only two hydrogen atoms combine with one oxygen atom to form H. O. Which of the following helps to explain why?

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explanation: i will tell you how to if u answer my question.

law of conservation of matter

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.