Question: what may indicate that a chemical reaction has occurred?

Answer: release of energy, color change, gas bubble formation

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Question: what is the formula for the compund dinitrogen tetroxide?

Answer: N2O4

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Question: Does KCl+Br2→KBr+Cl2 follow the law of conservation of mass?

Answer: no

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Question: In the chemical equation wA+xB→yC+zD, if you know the number of moles of A that react, you can determine…

Answer: the number of moles of each reactant and product

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Question: What is the correct name for the acid HCH3COO?

Answer: acetic acid

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Question: What is the correct name for the compound P2Cl4.

Answer: diphosphorus tetrachloride

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Question: Is FeS(s)+2HCl(aq)→H2S(g)+FeCl2(aq) an example of double-displacement?

Answer: yes

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Question: The reaction 2C2H2(g)+5O2(g)→4CO2(g)+2H2O(l) is…

Answer: single-displacement

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Question: The reaction 2C2H2(g)+5O2→4CO2(g)+2H2O(l) is…

Answer: combustion reaction

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Question: Does 2HgO(s)→2Hg(l)+O2(g) represent a decomposition reaction?

Answer: yes

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Question: To balance a chemical equation, it is permissible to adjust the…

Answer: coefficients

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Question: A mixture of propane and oxygen react to form carbon dioxide and water. What type of chemical reaction is this?

Answer: combustion

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Question: One element replaces another in a compound during which displacement reaction?

Answer: single-displacement

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Question: The platinum(II) ion and the platinum(IV) ions have charged of…

Answer: 2+ and 4+ respectively

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Question: What type of chemical reaction results in the formation of a single product?

Answer: decomposition

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Question: What is the formula for the compound for the compound made of aluminum ion, Al 3+, and sulfate ions, SO4 2-?

Answer: Al2(SO4)3

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Question: In the equation 2Al2O3→4Al+3O2, what is the mole ratio of aluminum to oxygen?

Answer: 4:3

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Question: The numbers of molecules on each side of the equation are equal indicates that a chemical equation is….

Answer: balanced

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Question: In the expression 3CO2, the number 3________ and the number 2 is a _____________

Answer: both coefficiants

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Question: In which type of reaction do two or more compounds react to form one product?

Answer: synthesis

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Question: What coefficients correctly balance the formula equation below?

Answer: 2,2,3

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Question: Reaction to stoichiometry is based on chemical equations and…

Answer: the law of conservation of mass

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Question: What reactant controls the amount of product formed in a chemical reactions?

Answer: limiting reactant

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Question: A chemical reaction involving substances A and B stops when B is completely used. B is which reactant

Answer: limiting

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Question: What is the mathematical expression for the relationship among percentage yield, actual yield, and theoretical yield?

Answer: percentage yield=actual yield/theoretical yield x 100

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Question: To determine the limiting reactant in a chemical reaction involving known masses of A and B, one could calculate…

Answer: the number of moles of B and the number of moles of A available

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Question: If, in the reaction A+B→C+D, the quantity of B is insufficient to react with all of A,

Answer: the reaction stops

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Question: What is the maximum amount of product obtained in a chemical reaction?

Answer: actual yield

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Question: If the percentage equation is equal to 100%, then the actual yield is __________ to the theoretical yield

Answer: equal

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Question: An equation for the dissociation of an ionic solid shows…

Answer: the solid on the left side and aqueous ions on the right side

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Question: Precipitation is an example of what type of reaction?

Answer: no

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Question: Is Fe2+(aq)+2Cl-(aq)+2OH-(aq)→Fe(OH)2(s)+2Cl-(aq) a net ionic equation?

Answer: no

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