questions 231 1a. what do the formulas, arrow, and plus signs in a chemical equation tell you?
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Questions 2311a. What do the formulas, arrow, and plus signs in a chemical equation tell you?
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Questions 2311b. Compare and Contrasting How are reactants and products treated the same in a chemical reaction? How are they treated differently?
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Questions 2312a. Explaining How does the idea of atoms explain the principle of conservation of matter?
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Questions 2312b. Applying Concepts If the total mass of the products of a reaction is 250g, what was the total mass of the reactants?
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Questions 2313a. Reviewing What are three types of chemical reactions?
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Questions 2313b. Inferring What is the smallest possible number of products in a decomposition reaction?
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Questions 2313c. Classifying Classify the following reaction:P4O10 + 6H2O 4H3PO4
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Questions 231Practice__Fe2O3 + __C __Fe + __CO2
__SO2 + __O2 __SO3
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Questions 229Balancing Chemical Equations1. Balance the equation for the reaction of sodium metal (Na) with oxygen gas (O2), forming sodium oxide (Na2O).
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Questions 229Balancing Chemical Equations2. Balance the equation for the reaction of tin (Sn) with chlorine gas (Cl2), forming tin chloride (SnCl2).
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Questions 239Controlling Chemical Equations1a. What is activation energy?
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Questions 239Controlling Chemical Equations1B. Describing What role does activation energy play in chemical reactions?
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1c. Making Generalizations Look at the diagram in Figure 13, and make a generalization about activation energy in exothermic and endothermic reactions.
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Questions 239Controlling Chemical Equations2a. Identifying What are four ways that chemists can control the rates of chemical reactions?
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Questions 239Controlling Chemical Equations2b. Applying Concepts Which would react more quickly in a chemical reaction: a single sugar cube or an equal mass of granulated sugar crystals? Explain.
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Figure P. 236Energy Changes in Chemical EquationsBoth exothermic and endothermic reactions need energy to get started.Draw and compare the graphs.Figure P. 239Enzyme ActionAfter a reaction, an enzyme molecule is unchanged.