Chemistry

Chemistry, 04.07.2019 22:00, Gyalissunout3526

How can we increase the rate of collisions between the reactants in this reaction? mg + 2hcl → mgcl2 + h2 a. increase the concentration of h2 in the reaction mixture. b. decrease the temperature of the reactants in the reaction mixture. c. increase the concentration of mg in the reaction mixture. d. decrease the temperature of the entire reaction mixture. e. decrease the concentration of hcl in the reaction mixture.

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Biology, 10.07.2019 22:00, jadabugs8187

Why does an increase in temperature result in an increase in reaction rate?a) an increase in temperature raises the activation energy which increases the reaction rate.b) an increase in temperature causes the molecules to increase in size which increases reaction rate.c) an increase in temperature decreases the concentration of reactants which increases reaction rate.d) an increase in temperature causes an increases the number of collisions which increases reaction rates.

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Biology, 21.07.2019 08:30, samy14

Why does an increase in temperature result in an increase in reaction rate? a) an increase in temperature raises the activation energy which increases the reaction rate. b) an increase in temperature causes the molecules to increase in size which increases reaction rate. c) an increase in temperature decreases the concentration of reactants which increases reaction rate. d) an increase in temperature causes an increases the number of collisions which increases reaction rates.

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Biology, 22.07.2019 09:00, jzoda7318

Why does an increase in temperature result in an increase in reaction rate? why does an increase in temperature result in an increase in reaction rate? a) an increase in temperature raises the activation energy which increases the reaction rate. b) an increase in temperature causes the molecules to increase in size which increases reaction rate. c) an increase in temperature decreases the concentration of reactants which increases reaction rate. d) an increase in temperature causes an increases the number of collisions which increases reaction rates.

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Chemistry, 23.09.2019 18:50, jeanieb

If keq = 4 x 10^-7, which of the following is true? a) products are favored b) reactants are favored c) there are no reactants remaining d) reactants and products are present in equal amounts 2. what does a chemical reaction rate measure? a) the amount of reactant used b) energy change per unit of time c) change in amount of reactant per unit of time d) the amount of time needed for the reaction to come to completion 3. in an equilibrium reaction that makes more moles of gas than it consumes, what is the effect of increasing the pressure? a) the reaction makes more reactants b) the reaction makes more products c) the reaction is unchanged d) the answer cannot be determined 4. what is the effect of adding ore water to the following equlibrium reaction? co2 + h20 < --> h2co3 a) more h2co3 is produced b) there is no effect c) the equilibrium is pushed in the direction of the reactants d) co2 concentration increases 5. which of the following explains the increase in reaction rate from a catalyst? a) more collisions between particles, so more successful collisions b) catalysts do not increase the reaction rate c) same number of collisions, but more are successful d) fewer collisions but more successful 6. which of the changes listed below would shift the following reaction to the right? 4hci(g) + 02(g) < --> 2cl2(g) + 2h20(g) a) increase of pressure b) addition of cl2 c) decrease of pressure d) removal of 02

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