11. The mixtures are then stored in massive tanks that must preserve the proper chemical combination of each product. 12. The first fireworks were red and yellow, and colors were added later as chemical combinations were developed . .. 13. The electrolyte does not enter into chemical combination to perform the functions of the cell, acting as a conveyor. 14. Scientists have developed a chemical combination that might help smokers kick the habit by spoiling the pleasures of cigarettes. 15. Modern films need specific chemical combinations to work correctly .-- talk ) 18 : 08, 18 April 2010 ( UTC) 16. Another of many possible chemical combinations is hydrazine and nitrogen tetroxide which is hypergolic and commonly used in rocket engines. 17. Instead of four or five chemical combinations for rechargeable batteries, there could be 20, each appropriate for different types of products. 18. Tea tree oils come in six different chemical combinations : a terpinen-4-ol type, a terpinolene type, and four 1, 8-cineole types. 19. She works using RA-4 paper in large scale, by manipulating unique mark-making and chemical combinations to create lush, often ethereal abstractions. 20. Many of Arizona's rocks are formed largely of a mineral called hematite, which is a chemical combination of iron and oxygen.
