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adell [148]
3 years ago
7

Why do experiments need to be repeatable?

Chemistry
2 answers:
Vilka [71]3 years ago
5 0
They need to be repeatable to prove that results from the expirement are viable, that it didn't just happen because of a series of things outside of the scientists control. Repetition just makes the expirement seem more credible. 
maw [93]3 years ago
3 0
If they were not repeatable people would think the experiment is not accurate. If it can be repeated than the data can prove a very valid point. 
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Is each of these statements true? If not, explain why.(g) The rate of a reaction increases as the reaction proceeds.
Elina [12.6K]

The rate of a reaction rises as it progresses. The answer is false

<h3>What causes a reaction's rate to increase?</h3>

Generally speaking, raising the temperature of the reaction system, raising the concentration of a reactant in solution, and raising the surface area of a solid reactant will all raise the rate of a reaction. A catalyst can be added to the reaction mixture to speed up a process as well.

As reactants are used up, reactions often get slower with time. Catalysts are substances that, when added to a process, speed it up even if they are not themselves reactants.

learn more about reaction's rate refer

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7 0
2 years ago
Why must the ph ammonia buffer solution be stored and dispensed in the fume exhaust hood?
Vadim26 [7]

On the other hand ammonia is a very dangerous chemical which has a pungent smell and effect the eyes of the user. Thus it kept always in the fume exhaust hood for storing and dispensing function.  

The  pH of ammonia buffer contains ammonium hydroxide (NH₄OH) and a salt of ammonia with a  strong acid like (HCl) which produces, ammonium chloride (NH₄Cl) mixture. The evaporation rate of ammonia is so high at room temperature thus on opening of the buffer solution the ammonia get evaporated very fast and the concentration of ammonia decreases which affect the pH of the buffer solution.

Thus the reason to put ammonia buffer in fume hood is explained.


7 0
3 years ago
What is meant by localised orbitals? Explain.
Anni [7]
Localized molecular orbitals are molecular orbitals which are concentrated in a limited spatial region of a molecule, for example a specific bond or a lone lake on a specific atom.
5 0
4 years ago
The Lyman series of lines in hydrogen’s emission spectrum are invisible to the human eye, but they can
Evgen [1.6K]

Davis believed that he and his fellow citizens had the right to rebel against the government if it failed them

Our present condition, achieved in a manner unprecedented in the history of nations, illustrates the American idea that governments rest upon the consent of the governed, and that it is the right of the people to alter or abolish governments whenever they become destructive of the ends for which they were established.

Explanation:

8 0
3 years ago
How many electrons are in an atom of chlorine with a -1 charge? 17 16 18 8
nexus9112 [7]

Answer:

18

Explanation:

The atomic number of chlorine is 17 therefore the atom has 17 electrons, the ion however has 1 extra electron. The charge becomes negative because electrons have a negative charge. 17 + 1 = 18, therefore a chlorine ion with a charge of -1 has 18 electrons.

6 0
3 years ago
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