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Across 2. calcium phosphate + sodium chloride --> sodium phosphate + ? 10. "Matter cannot be created nor ____ in a chemical reaction." 12. Enzymes are examples 14. hydrogen chloride + sodium hydroxide --> sodium chloride + ? 15. H2 is an example of one 16. A process in which new substances with new physical and chemical properties are formed 17. copper + iron (II) sulfate --> copper (II) sulfate + ? 18. Two ionic compounds switch their cations 23. NaCl(aq). This tells you that sodium chloride is a(n) ______ in the reaction 25. ___H2 + ___NO --> __H2O + __N2 The coefficient that goes in front of N2 26. lithium + sulfur --> ? 29. A shorthand way of representing a chemical equation 30. It is possible to ____ the resulting products of a reaction given the reactants and knowing the reaction type. 31. Two substances react to form one complex substance 32. When the yield sign points in both directions, the reaction is said to be ____.

Down 1. These types of reactions feel cold to the touch 3. Another term for chemical reaction 4. Chemical equations must be balanced in order to obey the ___. 5. The substances that are changed in a chemical reaction 6. A complex substance breaks down into simpler substances 7. These can never be changed when balancing a chemical equation 8. Energy is released 9. The number that are used to balance a chemical equation 11. __C7H16 + __O2 --> __CO2 + __H2O The coefficient that goes in front of O2 13. A free element replaces and sets free another element in a compound 19. hydrogen carbonate --> water + ? 20. A solid that forms when two aqueous solutions are mixed together 21. A hydrocarbon (CH) is burned in oxygen producing carbon dioxide and water 22. A branch of chemistry that deals with the relative quantities of reactants and products in a chemical reaction. 24. The substances that are formed from a chemical reaction 27. A comparison of moles in a chemical reaction. Usually in the form of a fraction. 28. What the coefficients in a balanced equation represent when solving stoichiometry problems.