I need help with the questions shown below in the description ( reaction rates)

Qneprl_Ang
timer Asked: May 27th, 2018

Question Description

1. What sentence is FALSE?
a. If a collision between two molecules is very weak, they won't be able to react.

b. The activation energy is the minimum energy that a pair of colliding molecules need to have before a chemical change becomes a possibility.

c. A reaction is faster if it is catalyzed by and enzyme.

d. The enzyme lactase is able to catalyzed many different reactions in the body.

2. To increase the rate of reaction, we can

a. Decrease the pressure

b. Decrease the concentration of reactants

c. Increase the temperature

d. Add product to the mixture to increase the concentration of it.

TRUE OR FALSE

1. The energy necessary to start a reaction is called activation energy. When this activation energy is very high, the reaction will be slow.

2. In an experiment with baking soda and hydrochloric acid, the more concentrated is HCl reactant, the faster the reaction.

3. LOOK AT THE PICTURE ATTACHMENT IT'S NUMBER 8

4. If we crush a reactant, the surface area increases and the reaction is faster.

5. LOOK AT THE PICTURE ATTACHMENT IT'S NUMBER 10

Unformatted Attachment Preview

C. 87 is similar Reaction A is exothermic because the final energy is lower. This means that it has absorbed energy and the product gets hotter. a. 4. What sentence is FALSE? If a collision between two molecules is very weak, they won't be able to react. b. The activation energy is the minimum energy that a pair of colliding molecules need to have before a chemical change becomes a possibility. A reaction is faster if it is catalyzed by and enzyme d. The enzyme lactase is able to catalyzed many different reactions in the body. C. ке 5. To increase the rate of reaction, we can a. Decrease the pressure b. Decrease the concentration of reactants C. Increase the temperature d. Add product to the mixture to increase the concentration of it, True or false ? 6. The energy necessary to start a reaction is called activation energy. When this activation energy is very high, the reaction will be slow. 7. In an experiment with backing soda and hydrochloric acid, the more concentrated is HCI reactant, the faster is the reaction. 8. Given this reaction, 2N2O5(g) -> 4NO2 (g) + O2(g) The rate of reaction will decrease if we increase the pressure. 9. If we crush a reactant, the surface area increases and the reaction is faster 10. In this graph, the upper curve corresponds to an catalyzed reaction, and the bottom curve Enthalpy corresponds to a uncatalyzed reaction Products Reactants Time
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