Oxygen in the air can react with wood when a match is burned. Ash is produced. Which statement would be true?

A. The atoms of the ash did not exist before.

B. Ash has similar properties to oxygen.

C. The atoms of wood and oxygen disappear during the burning.

D. Ash is a different substance than wood.

D. Ash is a different substance than wood.

D the atoms of ash did not exist before

Explanation:

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a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

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.