Across
- 4. C8H18+O2>CO2+H2O
- 7. ionic equation, an equation for a reaction in solution showing only those particles that are directly involved in the chemical change
- 9. AlBr3+K2SO4>KBr+Al2(SO4)3
- 10. C3H8+O2>CO2+H2O
- 11. a substance that increases the rate of reaction by lowering the activation-energy barrier; the catalyst is not used up in the reaction
- 16. equation, an expression representing a chemical formula; the formulas of the reactants(on the left) are connected with an arrow by the formulas for the products(on the right)
- 18. equation, a chemical equation that does not indicate the relative amounts of reactants and products
- 19. reaction, a chemical change in which one element replaces a second element in a compound; also called a displacement reaction
- 20. reaction, a chemical change in which two or more substances react to form a single new substance; also known as a synthesis reaction
Down
- 1. reaction, a chemical change in which an element or a compound reacts with oxygen which often produces energy in the form of light and heat
- 2. Pb+H3PO4>H2+Pb3(PO4)2
- 3. reaction, a chemical change that involves an exchange of positive ions between two compounds
- 5. NO2>O2+N2
- 6. NaBr+Ca(OH)2>CaBr2 +NaOH
- 8. series, a list of elements in order of decreasing activity
- 12. a small whole number that appears in front of a formula in a balanced chemical equation
- 13. reaction, a chemical change in which a single compound is broken down into two or more simpler products
- 14. ionic equation, an equation that shows dissolved ionic compounds as dissociated free ions
- 15. ion, an ion that appears on both sides of an equation and is not directly involved in the reaction
- 17. equation, a chemical equation in which the mass is conserved; each side of the equation has the same number of atoms of each element