Chapter 5 - Chemical Reactions (Quiz)

b.) Oxidation

Are the substances shown with an asterick undergoing oxidation or reduction? Iron metal forms iron(III) oxide (Fe2O3). a.) reduction b.) oxidation

b.) Reduction

Are the substances shown with an asterick undergoing oxidation or reduction? Silver ions (Ag+) are electroplated into silver atoms. a.) oxidation b.) reduction

a.) Oxidation

Are the substances shown with an asterick undergoing oxidation or reduction? The biomolecule FADH2 loses hydrogen becoming FAD. a.) oxidation b.) reduction

100 Cal.

Calculate the number of Calories present in a chocolate chip cookie that contains 19g carbohydrate, 3g protein, and 5g fat. Express your answer to one significant figure and include the appropriate units.

b.) Exchange

Categorize the following reactions as synthesis, decomposition, or exchange reactions in the forward direction. Al2(SO4)3(aq)+6KOH(aq)→2Al(OH)3(s)+3K2SO4(aq) a.) decomposition b.) exchange c.) synthesis

c.) Exchange

Categorize the following reactions as synthesis, decomposition, or exchange reactions in the forward direction. CH4(g)+2O2(g)→CO2(g)+2H2O(g) a.) synthesis b.) decomposition c.) exchange

a.) Synthesis

Categorize the following reactions as synthesis, decomposition, or exchange reactions in the forward direction. N2(g)+3H2(g)⇌2NH3(g) a.) synthesis b.) decomposition c.) exchange

b.) endothermic

Classify the following as exothermic or endothermic reactions. On a reaction energy diagram, the reactants are lower energy than the products. a.) exothermic b.) endothermic

b.) Exothermic

Classify the following as exothermic or endothermic reactions. When two solids are combined in a test tube, the test tube gets hot. a.) endothermic b.) exothermic

a.) Oxidized b.) Reduced

Identify the reactant that is oxidized and the reactant that is reduced. H2(g)+O2(g)→H2O(g) oxidized, reduced a.) Hydrogen (H) b.) Oxygen (O)

a.) The concentration of reactants decreases as the reaction progresses so the rate slows.

Why does the rate of a chemical reaction decrease as the reaction progresses? a.) The concentration of reactants decreases as the reaction progresses so the rate slows. b.) The concentration of products decreases as the reaction progresses so the rate slows. c.) The concentration of reactants increases as the reaction progresses so the rate slows. d.) The concentration of catalyst changes as the reaction progresses so the rate slows.

C5H12(g)+8O2(g)→5CO2(g)+6H2O(l)

Write the products and balance the following reaction for the complete combustion of pentane, C5H12. C5H12(g)+O2(g)→? Express your answer as a chemical equation. Identify all of the phases in your answer.

Enzymes

_____ are biochemical catalysts.

2HBr(g)→H2(g)+Br2(g)

decomposition: HBr(g)→ Express your answer as a chemical equation. Identify all of the phases in your answer.

BaS(aq)+Pb(NO3)2(aq)→Ba(NO3)2(aq)+PbS(s)

exchange (double): BaS(aq)+Pb(NO3)2(aq)→ Express your answer as a chemical equation. Identify all of the phases in your answer.

Ca(s)+Fe(NO3)2(aq)→Ca(NO3)2(aq)+Fe(s)

exchange (single): Ca(s)+Fe(NO3)2(aq)→ Express your answer as a chemical equation. Identify all of the phases in your answer.

Ca(s)+Cl2(g)→CaCl2(s)

synthesis: Ca(s)+Cl2(g)→ Express your answer as a chemical equation. Identify all of the phases in your answer.