Question and answer
What happens to a catalyst in a reaction? A. It is unchanged. B. It is incorporated into the products. C. It is incorporated into the reactants. D. It evaporates away.
The answer is A. It is unchanged.
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Original conversation
User: What happens to a catalyst in a reaction? A. It is unchanged. B. It is incorporated into the products. C. It is incorporated into the reactants. D. It evaporates away.

Weegy: The answer is A. It is unchanged.
sharpies|Points 8827|

User: Which of the following statements about reaction rates is not true? A. One way to increase the reaction rate is to increase the temperature of the system. B. One way to slow down the reaction rate is to decrease the temperature of the system. C. One way to increase the reaction rate is to decrease the concentration of reactants. D. One way to increase the reaction rate is to decrease particle size.

Weegy: A. Increasing the temperature will increase reaction rate
AwesomeGuy200|Points 1177|

User: Active sites are specific to one type of _____. A. enzyme B. product C. substrate D. reactant

Weegy: Active sites are specific to one type of: C. SUBSTRATE.



User: Which of the following factors affects a reaction rate the most? A. activation energy B. whether one or two reactant molecules is required C. relative energy in reactant and product molecules D. relative masses of reactant and product molecules

Weegy: A. activation energy
Controler|Points 3928|

User: If a catalyst is used in a reaction, A. the energy of activation increases. B. different reaction products are obtained. C. the reaction rate increases. D. the reaction rate does not change

Weegy: It is letter C. the reaction rate increases. A catalyst is a substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process. [ In an equilibrium reaction it speeds up the rate of forward and backward reactions. But a catalyst will not affect the final equilibrium of the reaction. ]
Expert answered|carl1980|Points 112|

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Asked 5/3/2013 1:19:37 AM
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Weegy: C. friction between moving parts would transform the kinetic energy to heat. User: Block A slides down a ramp whose slope is 45°. An identical block B slides down a ramp whose slope is 60°. Both blocks start at a height of 2 meters. Compare the kinetic energies (KE) of the blocks just before they reach the bottom, assuming there is no friction. A. They are the same. B. Block A's PE is greater than block B's PE. C. Block B's PE is greater than block A's PE. D. The actual masses must be known in order to figure this out. Weegy: The answer is D. The actual masses must be known in order to figure this out. User: A child is on a pogo stick. At the top of her jump, her kinetic energy (KE) = 0 J, her gravitational potential energy (GPE) = 100 J, and the potential energy in the spring (SPE) = 0 J. At the bottom of the jump, immediately before the child jumps again, what do KE, GPE, and SPE equal? (Assume a closed system.) A. KE = 0 J, GPE = 100 J, and SPE = 0 J B. KE = 50 J, GPE = 0 J, and SPE = 50 J C. KE = 100 J, GPE = 0 J, and SPE = 0 J D. KE = 0 J, GPE = 0 J, and SPE = 100 J Weegy: D. halfway between the highest point and the lowest point User: Why does a catalyst cause a reaction to proceed faster? A. The only reason is that there are more collisions per second. B. The only reason is that collisions occur with greater energy. C. The only reason is that the activation energy is lowered. D. There are more collisions per second and the collisions are of greater energy. Weegy: Catalyst causes a reaction to proceed faster is because the activation energy is lowered, hence speeding up the reaction. (More)
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