
Physical Science Ch 21
Quiz by 7-12 Sped
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13 questions
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- Q1A(n) chemical equation has the same number of atoms of each element on each side of the equation.complexbalancedsimple30s
- Q2Each substance on the left side of the arrow in a chemical equation is a _______.coefficientcatalystreactant30s
- Q3If heat must be added to a chemical reaction for the reaction to take place, the reaction is _______.endothermicbalancedexothermic30s
- Q4What tyep of reaction is shown in the following chemical equation: NH3 + HC1 -> NH4Cl?decompositionsynthesisdouble-displacement30s
- Q5Which of the following could represent a decomposition reaction?compound = element + elementcompound + compound = compound + compoundelement + compound = element + compound30s
- Q6A substance that speeds up a chemical reaction without being permanently changed itself is a(n) _________.coefficientcatalystinhibitor30s
- Q7The breaking down of a substance into two or more simpler substances is _______.decompositiona catalystdisplacement30s
- Q8Each substance to the right of the arrow in a chemical equation is a(n) ____>reactantcatalystproduct30s
- Q9Substances that prevent, or slow down, chemical reactions are called _____.catalystsinhibitorsendothermics30s
- Q10A chemical reaction in which heat energy is released is _____.exothermicendothermicflammable30s
- Q11According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?the masses are equalthe mass of the products is greaterthere is no relationship30s
- Q12What type of reaction is shown in the following chemical equation: 2H2) -> 2H2 + O2?double-displacementdecompositionsingle-displacement30s
- Q13The burning of wood in a campfire that produces heat and light would be both an ______ and an _______ reaction.exergonic, exothermicexergonic, endothermicendergonic, exothermic30s