Which Chemical Equation Is Unbalanced? A. $C + O _2 \rightarrow CO _2$ B. $Sr + O _2 \rightarrow 2 SrO$ C. $6 H _2+3 O _2 \rightarrow 6 H _2 O$ D. $H _2+ H _2+ O _2 \rightarrow H _2 O + H _2 O$

Working by means of chemicals Dec 16, 2025all the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds. Dec 26, 2025cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization.

Jan 13, 2026a chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. 5 days agoethanol is an important industrial chemical; It is used as a solvent, in the synthesis of other organic chemicals, and as an additive to gasoline.

Jan 9, 2026cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and. Dec 22, 2025periodic table, in chemistry, is an organized array of all the chemical elements in order of increasing atomic number. Dec 27, 2025nitric oxide, colourless toxic gas that has important chemical signaling functions in animals and is a serious air pollutant.

Jan 6, 2026chemical weapons convention (cwc), international treaty that bans the use of chemical weapons in war and prohibits all development, production, acquisition, stockpiling, or transfer of such. Dec 5, 2025chemical industry, complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives.