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Alborosie
2 years ago
15

When food spoils, it is a chemical reaction. For example, rancid butter is produced when the fat molecules in the butter undergo

oxidation. Another factor that can lead to the decomposition of food molecules is the presence of bacteria, fungi, and other microorganisms. To preserve food, manufacturers try to slow down the rates of such reactions. Note that microorganisms need both water and oxygen for their metabolic reactions to occur.What actions will decrease the rates of the reactions in the food (and therefore slow down spoiling)?Drag each item to the appropriate bin.Remove water from food by dehydration.Package food in water.Transport food in a refrigerated truck.Store food in the open air.Place food on a warm surface.Store food in airtight containers.Store food in a refrigerator after opening.Options: 1. Decreases the rate of reaction2. Does not decrease the rate of reaction
Chemistry
1 answer:
Sergio039 [100]2 years ago
4 0

Answer: Decreases the rate of reaction

  • Remove water from food by dehydration.
  • Transport food in a refrigerated truck.
  • Store food in airtight containers.
  • Store food in a refrigerator after opening.

Does not decrease the rate of reaction

  • Store food in the open air.
  • Place food on a warm surface.

Explanation: Dehydration of food excludes water from food which is one of the factor needed by microorganisms for growth, <em>so it decreaese the rate of reaction.</em>

Transporting food in refrigerated trucks lowers the temperature of food and not many microorganisms are active at very low temperatures, so it <em>decreases the rate of reaction.</em>

Storing food in airtight containers excludes air which is one of the factors required for microbial activity, so <em>it decreases reaction rate.</em>

Storing food in refrigerators after opening also <em>lowers the temperature of food and hence the the rate of microbial activit</em>y.

Storing food in the open air <em>does not decrease microbial activity</em> instead it provides microorganisms with the favorable conditions for their activity such as air and water from water vapor in the air.

Placing food on a warm surface <em>does not decrease rate of reaction</em> because microorganisms are very active in warm and humid environments.

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Chemists use letters of the alphabet as ____ for the elements.
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Answer:

The symbol is the right answer.

Explanation:

The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.

8 0
2 years ago
Which industrial facility is most likely to produce toluene and benzene wastes?
lesantik [10]

Well, you didn't give me any options so if this isn't the answer to your pacific question then I apologize.

but most likely a steel smelting facility.

Hope this helps

5 0
2 years ago
Read 2 more answers
For each reaction, identify the element that gets reduced and the element that gets oxidized. 2AgCl+Zn⟶2Ag+ZnCl2 Identify the el
PolarNik [594]

Answer:

Explanation:

Oxidation no is equal to charge on each atomic ion. If it is increased , element is oxidised and if it is decreased , element is reduced .

2AgCl+Zn⟶2Ag+ZnCl2

Zinc is oxidised , Ag is reduced .

Ag⁺ converts to Ag . ( oxidation number is reduced ) so Ag is reduced.

Zn converts to Zn⁺² ( oxidation number is increased ) so Zn is oxidised .

4NH₃+3O₂⟶2N₂+6H₂O

oxidation number of nitrogen in ammonia is - 3

oxidation no of nitrogen in nitrogen is zero.

Oxidation no of nitrogen is increased so it is oxidised.

oxidation no of oxygen is zero in oxygen and its oxidation no in water is -2 . So oxidation no is reduced so oxidation  is reduced.

Fe₂O₃+2Al⟶Al₂O₃+2Fe

oxidation no of Fe in Fe₂O₃ is + 3 and it is zero in Fe so iron is reduced.

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7 0
2 years ago
A 1.0-gram sample of solid iodine is placed in a tube and the tube is sealed after all of the air is removed. The tube and the s
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Answer:

27.0

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Because Mass can neither be created nor be destroyed hence total mass of sample of iodine and tube remain equal as it is sealed.

7 0
2 years ago
How many simple distillation columns are required to purify a stream containing five components into five 'pure"products? Sketch
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Answer: one simple distillation column is required to separate the stream into five pure products. With four different flat bottom flask, for collection of the distilled products

Explanation: simple distillation works with the difference in boiling points of the liquid to be separated. For the separation of five different constituent to be possible, we have to know the boiling points of the constituents.

For your understanding, let's define constituents in the liquid to be A, B, C, D, E. And the boiling points increases respectively. Start by heating the liquid to the boiling point of A to extract A. After a while check if the constituents A is still dropping in the flat bottom flask, if it has stopped dropping, it simply means that we have extracted all A constituents in the liquid, label the Flask A. Get another flask to extract constituent B.

Heat the mixture to the boiling point of B, after a while check if constituent B is still dropping in the flat bottom flask, if it has stopped dropping,it means that we have extracted all B constituent in the liquid, label the Flask B. Get another flask for C.

Repeat the same process for C and D.

After Extracting D we don't need to distillate E because we already have a pure form of E inside to the conical flask.

SEE PICTURE TO UNDERSTAND WHAT A SIMPLE DISTILLATION LOOKS LIKE

3 0
2 years ago
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