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8 Cards in this Set
- Front
- Back
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grain elevator explosion
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idk |
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Observations that a chemical reaction is taking place |
Light Color Change Noise Heat |
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the rate at which carbohydrates react in the body is much ________ than if they were to react in a grain elevator.
faster / constant / slower |
Slower |
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Consider the following reaction in a closed system:
H2(g) + I2(g) → 2HI(g) Which of the following will decrease the rate of the forward reaction? add some H2 remove some HI increase the volume increase the temperature |
increase the volume
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Which of the following increases the average kinetic energy of colliding particles?
adding a catalyst increasing the temperature increasing the reactant concentration increasing the surface area |
Surface area |
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Consider this reaction:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g). Which combination of factors will affect the rate of the reaction? temperature, concentration, and surface area temperature and concentration only concentration and surface area only temperature and surface area only |
temperature, concentration, and surface area
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A student placed 3.0 grams of Mg into some HCl in two different experiments. In each case, it reacted according to the following equation:
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g). In the first experiment, it took 32 minutes for all of the Mg to react. In the second experiment, it took 54 minutes for all of the Mg to react. Which of the following could account for the change in reaction rate of the second experiment? a catalyst was added the Mg was powdered into H2 the H2 was decreased the temperature was decreased |
the temperature was decreased
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Consider this reaction:
3Fe2O3(s) + CO(g) → 2Fe3O4(s) + CO2(g). Which of the following would increase the rate of the reaction? adding the Fe3O4 decreasing the temperature increasing the surface area of Fe2O3 increasing the volume of the reaction vessel |
increasing the surface area of Fe2O3
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