Chemistry Changes Quiz

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Energy, reactions, and properties

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Carson Adams

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Chemistry Changes Quiz


Chemistry Changes QuizVersión en línea Energy, reactions, and properties por Carson Adams 1 Is boiling water a physical change (PC) or a chemical change (CC)? a Physical change b Both physical and chemical c None of the above d Chemical change 2 In an exothermic reaction, which statement is true? a The environment becomes warmer b More energy is absorbed than released c Energy is not involved d The products have more energy than the reactants 3 The substances undergoing chemical change are called what? a Reactants b Solutions c Mixtures d Products 4 What does the Law of Conservation of Mass state? a Atoms can be rearranged freely b Matter is neither created nor destroyed during a reaction c Mass increases during reactions d Energy cannot be created 5 In a chemical equation, what does a coefficient show? a Charge on the species b Identity of the solvent c Energy change d Actual number of atoms or molecules 6 For the NH3 formation from N2 and H2, the sum of coefficients in a balanced equation is: a 6 b 2 c 4 d 8 7 Adding a catalyst to a reaction will: a Increase the activation energy b Decrease the activation energy c Change the products to reactants d Stop the reaction 8 A reaction with two compounds as reactants and two as products is most likely: a Decomposition b Double replacement c Single replacement d Combination 9 The production of CO2 during burning of a fuel is an example of which type of reaction? a Decomposition b Combustion c Single replacement d Synthesis 10 Nail corrodes due to humidity is an example of a: a Chemical change b None of the above c Physical change d Biological change Feedback 1 Boiling is a change in state, not in chemical composition. 2 Exothermic releases energy to the surroundings, warming it. 3 Reactants are the starting substances that react. 4 In any chemical reaction, mass is conserved. 5 Coefficients denote how many units of each substance participate. 6 One balanced form is N2 + 3H2 → 2NH3; coefficients sum to 6. 7 Catalysts speed up reactions by lowering the activation energy. 8 Double replacement involves two compounds exchanging partners. 9 Combustion involves a fuel reacting with an oxidizer to form CO2 and H2O or similar. 10 Corrosion involves chemical transformation of the metal.

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Chemistry Changes Quiz

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Chemistry Changes QuizVersión en línea

por Carson Adams

Is boiling water a physical change (PC) or a chemical change (CC)?

In an exothermic reaction, which statement is true?

The substances undergoing chemical change are called what?

What does the Law of Conservation of Mass state?

In a chemical equation, what does a coefficient show?

For the NH3 formation from N2 and H2, the sum of coefficients in a balanced equation is:

Adding a catalyst to a reaction will:

A reaction with two compounds as reactants and two as products is most likely:

The production of CO2 during burning of a fuel is an example of which type of reaction?

Nail corrodes due to humidity is an example of a:

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