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lbvjy [14]
3 years ago
11

2.2: Describe how and when cleaning agents are used.

Chemistry
1 answer:
MrRa [10]3 years ago
5 0
There used for prevention and control of infection 
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Thre largest source of available freshwater on earth is
Burka [1]
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3 years ago
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Pairs
BabaBlast [244]

Atoms are made up of protons, neutrons, and electrons.

Energy can be neither created nor destroyed.

Water freezes at 0°C

If  a piece of platinum is placed in acid, it will not react.

<h3>What are the correct pairing of the given terms?</h3>

The correct pairing of the given terms are obtained from the given options as follows:

Atoms of elements contains three sub-atomic particles which are protons, neutrons, and electrons.

Energy is the ability to do work.

According to the law of conservation of energy, Energy can be neither created nor destroyed.

Water is a liquid which freezes at 0°C.

Therefore, Water freezes at 0°C.

Platinum is a metal which is less reactive than hydrogen, Hence, it cannot displace hydrogen from acids.

Hence, if a piece of platinum is placed in acid, it will not react.

In conclusion, the correct pairing gives the correct description of the properties of the given terms.

Learn more about atoms at: brainly.com/question/17545314

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3 0
2 years ago
A student in a chemistry lab is conducting an experiment using chemicals. Several violations were observed by the instructor. Wh
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Answer:

I would suggest wearing safety glasses as it minimizes the chance of harmful chemicals entering the eyes

Explanation:

6 0
3 years ago
Consider the reaction below. 2K+Br2------&gt;2K+ +2Br-
sergeinik [125]
Answer: only Br2.

Justification.

In  a chemical reaction the element that gains electrons experiments a reduction in its oxidation state, that is why it is said that it is reduced.

So, to know what element is being reduced you need to calculate the oxidation states of the elements involved.

Here I indicate the oxidation states of each element if the reaction putting them inside parenthesis:

Reactants side          Products side

K (0)                           K (1+)
    
Br (0)                          Br(1-)

So, K lost one electron, increasing its oxidation statefrom  0 to 1+, meaning that it is being oxidized.

And, each atom of Br gained one electron, reducing its oxidation state from 0 to 1-, meaning it is being reduced.

Therefore, the answer is that Br2 is the substance being reduced.
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3 years ago
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Match each statements with the state of matter it describes?
Len [333]

Answer:

Solid  liquids , plasma gas

Explanation:

It retains its shape regardless of the shape of the container

5 0
3 years ago
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