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- Multiple ChoicePlease save your changes before editing any questions.Which best defines "reaction rate"?Concentration change per unit timeHow long a reaction takesAdding a catalystCombining reactants with products
- Multiple ChoicePlease save your changes before editing any questions.A substance that increases speed of chemical reaction without being being changed is called:CatalystAcidBasepressure
- Multiple ChoicePlease save your changes before editing any questions.Activation energy is required to start a chemical reaction. What is activation energy?The energy needed for a reaction to occurThe minimum amount of energy needed for a reaction to potentially occurThe energy added by a catalystThe energy possessed by the products
- Multiple ChoicePlease save your changes before editing any questions.Increase in temperature of the reactants can do one of the followingSlow collision frequencyAllow less effective collision between the particlesCause particles to lose speedIncrease collision between the particles thus increasing the rate.
- Multiple ChoicePlease save your changes before editing any questions.Increasing the pressure of a reacting vessel only affects:Gaseous reactantsSolid reactantsLiquid reactantsNone of the above
- Multiple ChoicePlease save your changes before editing any questions.Decreasing the particle size increases the reaction rate becauseIt makes particles move fasterIt increases the likelihood of collisions with the correct geometryIt decreases the surface area available to reactIt increases the number of collisions
- Multiple ChoicePlease save your changes before editing any questions.This helps to speed up a reaction but does not take part in the chemical reaction.coeffiecentsreactantscatalystcombustion
- Multiple ChoicePlease save your changes before editing any questions.The amount of a substance in a given volume.concentrationtemperaturesurface areacatalyst
- Multiple ChoicePlease save your changes before editing any questions.Grinding a seltzer tablet into powder increases the rate of reaction due to increasedconcentrationsurface areatemperaturereactants
- Multiple ChoicePlease save your changes before editing any questions.Exposing more particles for collisions is an increase inconcentrationsurface areatemperaturecatalyst
- Multiple ChoicePlease save your changes before editing any questions.Increasing the concentration increases the speed of reaction bylowering activation energyincreasing collisionsspeeding up the reactantsexposing more reactant
- Multiple ChoicePlease save your changes before editing any questions.Which factors increase the rate of a reaction.increasing temperatureincreasing concentrationincreasing surface areaall of these
- Multiple ChoicePlease save your changes before editing any questions.Increasing concentration increases reaction rate due to more collisions.TrueFalse
- Multiple ChoicePlease save your changes before editing any questions.Which of the following slows down the rate of a chemical reaction?Place the reactants in hot waterPlace the products in ice bathPlace the reactants in a ice bathKeep stirring the reactants with a stirring rod
- Multiple ChoicePlease save your changes before editing any questions.
B representsenergy absorbedenergy releasedactivation energy