What must happen before a chemical reaction can begin

- the activation energy must be exceeded

- the activation energy must be reached

-the concentrations of products and reactants must be equal

- the concentration of reactant molecules must be reduced

Answers

Answer 1

Answer:

its B

Explanation:

Answer 2

The incident that happen before a chemical reaction can begin the activation energy must be reached. Thus, option B is correct.

What is activation energy?

The extra energy is the minimum amount of extra energy which required by reacting molecule to convert into the product.

Factor at which activation energy depends are as follows:-

1: Activation energy depends upon the nature of reactant if reactant is ionic then required activation energy is less and if reactant is covalent then required activation energy is high.

2: Nature of catalyst if catalyst is positive then required activation energy is less and if catalysts is negative then required energy is high.

3: Activation energy doesn't depend on pressure, temperature, volume etc.

Temperature is one the important factor at which any reaction is depend. In any reaction if temperature is increases the rate of reaction is increases and if temperature is decreases the rate of reaction is decreases.

Here, is the Arrhenius Equation  which shows the temperature dependence of the rate of a chemical reaction.

k=Ae^−EaRT

Where,

k= rate constant of the reaction

A= Arrhenius Constant

Ea= Activation Energy for the reaction (in Joules mol^-1)

R= Universal Gas Constant

T= Temperature in absolute scale (in kelvins)

Therefore, The incident that happen before a chemical reaction can begin the activation energy must be reached. Thus, option B is correct.

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Related Questions

OW Dia Planets Form?
Question 7 of 10
A rock falling through Earth's atmosphere from outer space is called a
Answer here
SUBMIT

Answers

Answer:

asteroid

Explanation:

it is called asteroid andThe various planets are thought to have formed from the solar nebula, the disc-shaped cloud of gas and dust left over from the Sun's formation. The currently accepted method by which the planets formed is accretion, in which the planets began as dust grains in orbit around the central protostar

what is 120*566= just helppp

Answers

67920 I and hoping * means multiplying

Answer:

67,920.

Explanation:

hope this helps!!

I am an element with a high melting point, a solid at room temperature, and have a shine to me that is quite striking. Scientists refer to me as a ___

Answers

Answer:

the answer is metal okkkkkk?

4. Cell Theory has three parts: The cell is the basic unit of life in all living things, all cells come from existing cells and all living things have cells. Which one is not true?*
1.Non-living things are made up of cells 2.Cells were discovered by Robert Hooke
3.All organisms are made up of one or more cells
4.All cells are microscopic in size​

Answers

Answer:

1

Explanation:

cells have an exlusive deal for only living things

In the periodic table, Groups are_____ columns.

Answers

Answer:

Vertical

Explanation:

Biology class :)

Compounds are the smallest unit of an element that occurs most commonly in nature.
Select the rewording of the statement that is true.

A.) Molecules are the smallest unit of an element or compound that commonly occur in nature.
B.) Atoms are the smallest unit of an element that commonly occur in nature.
C.) Molecules are the smallest unit of a compound that occurs on the periodic table.
D.) Compounds are the smallest unit of an element that occurs on the periodic table.

Answers

The answer is A.) Molecules are the smallest unit of an element or compound that commonly occur in nature.

The answer is B: Atoms are the smallest unit of an element that commonly occur in nature.

3. The table below lists three characteristics of an atom of an element. An
atom of which element is described by the data in the table? *
Characteristics of an Element
Number of
Protons
Number of
Neutrons
Number of
Valence Electrons
37
48

Answers

Answer:the answer is Rubidium

Explanation: quizzzzzlm app thing also my teacher told me. I got you fa

Which statement describes gravity, There is no define of measurement for gravity, Gravity is the force that pulls objects towards Earth's center, Objects that have a small mass will have no gravitational pull, Gravitational pull between two objects decrease as the mass of one increases.

Answers

Answer:

Gravity is the force that pulls objects towards the earth centre.

Explanation:

According to the postulation of Sir Isaac Newton, explaining Gravity using an apple falling down from a tree. He was so curious to find out why this happened. I hope this helps.

The statement which best describes gravity is that it is the force that pulls objects toward Earth's center. Thus, the correct option for this question is B.

What is Gravity?

Gravity may be defined as a type of force through which a planet or any other celestial body draws objects toward its center. It is only the force of gravity that specifically keeps all of the planets in orbit around the sun. This force attracts a body toward the center of it.

According to the context of this question, it is a fundamental interaction that causes the mutual attraction between things with mass or energy.

The best example of gravity is understood by throwing a ball high in the air, it will certainly be coming back to the surface of the earth after attaining its maximum height with respect to the energy by which is thrown.

Therefore, the statement which best describes gravity is that it is the force that pulls objects toward Earth's center. Thus, the correct option for this question is B.

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Which of these units are most commonly found/used in science?
feet/inches
pounds/ounces
yards/miles
meters/grams

Answers

Answer:

Meters/grams are the most common.

Explanation:

Grams are very exact and meters are also common to use.

meters/grams or m/g

only america uses imperial, the rest of the world uses metric

Which of these plant cell structures is also found in a prokaryote?

Answers

Answer:

D. Cell wall

Explanation:

Cell wall is also present in prokaryotes it is made of peptidoglycan layer.

What are two abiotic and two biotic conditions in a coral reef that provide the conditions necessary for it to have high biodiversity?

Answers

Answer:

vbfxb

Explanation:

vgjjg

Basalt is dark in colour. Give reason.​

Answers

Answer:Basalt is usually dark grey to black in colour, due to a high content of augite or other pyroxene minerals, but can exhibit a wide range of shading.

Explanation:

Some basalts are quite light-coloured due to a high content of plagioclase, and these are sometimes described as leucobasalts.

Question 5 (1 point)
Identify the independent variable: Two plants were grown in two different brands of potting soil, they received the same amount of
sunlight and water.
a
b
The plants
The sunlight
The water
The potting soil
С
Od

Answers

The potting soil because it’s the cause

HELP ME!!
What is cancer?
addition of new cells to replace damaged cells
DNA replication
cellular death
uncontrolled cell division

Answers

Answer: uncontrolled cell division

Explanation: uncontrolled cell division forms a cancer turmor which can kill.

15 points+ brainliest!! please help i need this done asap :(!

Answers

independent variable is when u have a variable and it stands alone, and is changed or controlled in a experiment. (the liquid used to measure a plant) The dependent variable is the what u are measuring(height, time) . The dependent caribe is depending on the independent variable! The difference is that fact that independent variable dosent need anything to determine the correct answer and dependent dose. they also stand for different things.

it’s important for scientist to publish a description of procedures along with results because it shows how the scientist came up with the results, and shows they were just saying what they thought was right , they have proof, and can go back and explain how the procedures correlate with the data/ results.

Which organic compound is not found in the cell membrane?

Answers

Answer: Lignin

Explanation:

Many farmers and gardeners compost their plant and animal waste. The living material naturally decays in compost bins, forming a dirt-like substance that’s rich in nutrients. The next season, farmers use this substance as a natural fertilizer for their crops. A biology student has grown tomato plants for several years. Until now, he used an artificial fertilizer formulated for tomato plants. This fertilizer caused his plants to grow faster and taller than they grew in unfertilized soil. The student wants to know whether using natural compost will cause his tomato plants to grow faster and taller than his artificial fertilizer. Answer the following questions to plan an investigation using the steps of the scientific method and help the student find the answer to his question. Part E How would you conduct your investigation? In your answer, explain your independent and dependent variables.

Answers

Answer

no .  you should give one plant natural fertilizer  and the other artificial fertilizer to decide which works the best

Explanation:

because it is made for tomatoes

Answer:

part E

The dependent variable is the growth rate of the plant. The independent variable is the type of fertilizer used over time. There will be three groups of tomato plants raised from seed: one group will be a control group without any fertilizer, the second group will be planted in soil with artificial fertilizer, and the third group will be planted in soil with compost. The height of the plants will be measured every five days, over a 30-day period.Explanation:

what happens when soil leaches​

Answers

Answer:

In agriculture, leaching is the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. ... Leaching may also refer to the practice of applying a small amount of excess irrigation where the water has a high salt content to avoid salts from building up in the soil (salinity control).

Explanation:

A scientist finds several hundred fish fossils in the dessert. This evidence best supports which of the following scientific ideas?

Answers

Is there more information?

How does diagnosis explain why 1 ml of liquid from her small intestine digested protein slowly but 1 mg of her pure protease protein normally?

Answers

Answer:

Due to the absence of proteolytic enzymes.

Explanation:

The study diagnosis that small intestine digested protein slowly due to the absence or decrease quantity of proteolytic enzymes in the small intestine. Proteolytic enzymes are responsible to speed up the digestion process and after digestion amino acid is produced which is directly injected into the blood that is used by the body for the formation of muscles.

Point sources of pollution are dispersed and often difficult to identify.

a. True

b. False

Answers

the correct answer is false

if plant need sunlight to grow, then the plants in the shade will not grown as well as the plants in the sun.​

Answers

Answer:

True

Explanation:

This is a true statement. The answer is true.

Answer:

True, plants in the sun grow larger and fatster than those growing in the shade t

statements that accurately describe the structure of a cell membrane

Answers

Answer:

The cell membrane is a single layer of phosphate molecules and lipids. The cell membrane is a double layer of phosphate molecules and lipids. The cell membrane has protein channels that are partly inside and partly outside the cell. The cell membrane has protein channels that are entirely inside the cell.

Explanation:

What separates mildew out from other fungi?

Answers

Answer:

Mildew is more identifiable and can be treated with store bought cleaner, but other fungi can be the result of a larger infestation

which type of molecule can be found in living things lacks carbon atoms

Answers

Answer:

Water.

Explanation:

Answer:

H2O

Explanation:

What best describes the scientific process?

Answers

Answer:

B.

Explanation:

The scientific method follows a series of six steps in which it includes the one from observation to reaching a conclusion.

The statement that best describes the scientific process is that it is a way to answer scientific questions.

What is the scientific process?

The scientific process is a method of discovering knowledge about the natural world in the following manner:

making falsifiable predictions (hypotheses). testing them empiricallydeveloping theories that match known data from repeatable physical experimentation.

The scientific process involves the following steps:

Asking a questionDoing background researchConstructing a hypothesis. ...Testing of the hypothesis by doing an experimentAnalyzing the data and drawing a conclusion

The aim of the scientific process is to answer a scientific question or proffer solution to a problem.

Learn more about scientific process at: https://brainly.com/question/7508826

dividing tissues are also called
1. meristematic tissue
2. epithelial tissue
3. both a and b
4. all of the above
pls answer quickly ....

Answers

Answer:

1. meristematic tissue

Explanation:

they are cells that have the ability to divide

List one Characteristic of Life that lets you
know that a tree is alive.


Answers

it gives and provides us w oxygen

Answer:

growth and change, ability to reproduce;  have a metabolism and breathe;, and maintain homeostasis

Explanation:

what is the composition of fatty acid tails of trans fat?

Answers

Answer: Like fats, they are typically composed of fatty acid chains attached to a backbone of glycerol. Instead having three fatty acid tails, however, phospholipids generally have just two, and the third carbon of the glycerol backbone is occupied by a modified phosphate group.

Answer:

Like fats, they are typically composed of fatty acid chains attached to a backbone of glycerol. Instead having three fatty acid tails, however, phospholipids generally have just two, and the third carbon of the glycerol backbone is occupied by a modified phosphate group.

Explanation:

what does an organism trophic level indicate about that organism ?

Answers

Answer:

The trophic level of an organism is the position it occupies in a food web. A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The trophic level of an organism is the number of steps it is from the start of the chain.

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