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Natalija [7]
3 years ago
12

Which statement best explains the role of a

Chemistry
1 answer:
ikadub [295]3 years ago
7 0
The answer is (4). If you look at a Maxwell-Boltzmann energy curve, you will see that lowering the activation energy will increase the proportion of molecules with sufficient energy for a successful reaction collision. Therefore, a reaction with lower activation energy will proceed more quickly. Often, this lower activation energy is obtained by another mechanistic pathway. Catalysts increase reaction speed through these two basic mechanisms.
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In Rutherfords gold foil experiment, what caused the deflection of the positively charged particles?
dmitriy555 [2]
The particles<span> that completely went through passed through the empty space in the atom. The </span>particles<span>that were </span>deflected<span> to the sides were deflated by a passing electron that moved the alpha </span>particle<span> out of the way. The </span>particles<span> that were bounced back hit the nucleus in the center that it bounced off.
</span>

hoped that helped
3 0
3 years ago
Read 2 more answers
when a species must survive changes in the environment, would they want to use sexual or asexual reproduction. Explain
eduard
Sexual. First of all because any thing that is something like an animal can not participate in asexual reproduction. A species is a small population of a certain animal that can survive and produce fertile offspring
5 0
3 years ago
A 135 g sample of a metal requires 2.50 kJ to change its temperature from 19.5°C to 95.5°C to 100.0°C?
just olya [345]

Answer:

0.23J/g°C

Explanation:

Given parameters:

Mass of sample  = 135g

Amount of heat  = 2.5kJ

Initial temperature  = 19.5°c

Final temperature  = 100°C

Unknown:

Specific heat capacity of the metal  = ?

Solution:

The specific heat capacity of a substance is the amount of heat required to the raise the temperature of 1g of the substance by 1°C.

   H  = m C (T₂ - T₁ )

H is the amount of heat

m is the mass

C is the specific heat capacity

T₂ is the final temperature

T₁ is the initial temperature;

     2.5 x 10³  = 135 x C x (100 - 19.5)

     2500 = 10867.5C

       C = \frac{2500}{10867.5}   = 0.23J/g°C

8 0
3 years ago
Which of the following compounds will give rise to an acidic solution in water? Group of answer choices KNO3 HC2H3O2 Na2CO3 NaCH
Effectus [21]

Answer:

HC2H3O2

Explanation:

Acetic acid is a colorless organic compound liquid called ethanoic acid. It has molar mass of 60.052 g/mol. It is soluble in water. Its formula is CH3COOH. If water is combined with HC2H3O2 then it will give rise to acetic acid solution. When acetic acid is combined with water it creates hydronium and acetate ions.

7 0
4 years ago
MULTIPLE CHOICE QUESTION
Tpy6a [65]
They get closer together
7 0
3 years ago
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