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A 100 The substances that undergo change in a chemical reaction are called
reactants A 100
Hydrochloric acit, HCl, is added to solid NaOh. After the reaction is finished NaCl idssolved in water remains. What are the products? A 200
NaCl and H2O A 200
Which of the following does NOT state what the arrow means in a chemical equation? forms, produces, or conserves A 300
conserves A 300
True or False There is only one reactant in a synthesis reaction. A 400
false A 400
In a compound, chemical energy is contained in the ______. A 500
bonds A 500
True or False Bonds of the reactants in a chemical reaction are broken, and bonds of the products are formed. B 100
True B 100
The total amount of energy before and after a chemical reaction is the same. Thus, energy is ____. B 200
conserved B 200
In general, if the temperature of a chemical reaction is increased, the reactio rate ___. B 300
increases B 300
A log is burning in a fireplace. If the amount of oxygen reaching the log is decreased, what is true about the reaction rate? B 400
it decreases B 400
Reaction rates do NOT tell you how fast B 500
substances are changing states
In a chemical reaction, the total mass of the reactants equals the total mass of the products. This is the Law of _______. C 100
conservation of mass C 100
A ____ is the number that appears before a formula in a chemical equation. C 200
coefficient C 200
The element _____ is always present in a combustion reaction. C 300
oxygen C 300
DAILY DOUBLE C 400 DAILY DOUBLE Place A Wager
In a double replacement reaction, there are two reactants and two ______. C 400
products C 400
During a chemical reaction, energy is released during the ______ of chemical bonds. C 500
formation C 500
Cooking requires continuous addition of energy to the chemical reactions that are taking place. The chemical reactions involved in cooking can be described as _____ D 100
endothermic D 100
Measuring how quickly a reactant disappears is one way to measure the ____ of the reaction. D 200
rate D 200
If something that reacts with an acid is crushed before being placed in the acid, the reaction rate would ______. D 300
increase D 300
The statement that when a change is introduced to a system in equilibrium, the equilibrium shifts in the direction that relieves the stress on the system is known as ________ D 400
La Chatelier’s Principle D 400
What is the purpose of balancing a chemical equation? D 500
it shows the mass is conserved D 500
What kind of reaction releases heat into the environment? E 100
exothermic E 100
What kind of reaction takes in heat? E 200
endothermic E 200
Name 3 kinds of reactions. E 300
single-replacement double-replacement combustion synthesis decomposition E 300
What are coefficients? E 400
The larger numbers in front of compounds. E 400
What are subscripts? E 500
The smaller, lower numbers after an element. E 500
When balancing an equation, which numbers can you NOT change? F 100
subscripts F 100
Balance this equation: Mg + O2 = MgO F 200
2Mg + O2 = 2MgO F 200
What happens when chemical bonds are broken? F 300
energy is released F 300
In a decomposition reaction, what is being broken down? F 400
a compound F 400
What does it mean when someone calls an equation “balanced”? F 500
It means there is the same number of elements on both sides of the equation. F 500
The Final Jeopardy Category is: Balancing Equations Place your wager. Click on screen to begin
Balance this equation: Na + Br2 = NaBr Click on screen to continue
2Na + Br2 = 2NaBr Click on screen to continue
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