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juin [17]
2 years ago
12

How many elements are in the periodic table

Chemistry
1 answer:
babunello [35]2 years ago
7 0
There are 118 elements in the periodic table.
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Which of the following best describes the result of using a catalyst in a chemical reaction?
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A catalyst only speed up a chemical reaction
D is correct
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Fill in the blanks with the words given below-
ioda

Answer:

1. Metal.

2. Atom.

3. Homogeneous

4. Compounds.

5. Lustrous

6. Saturated.

7. Colloidal; true.

8. Homogeneous.

Explanation:

1. An element which are sonorous are called metal.

2. An element is made up of only one kind of atom.

3. Alloys are homogeneous mixtures.

4. Elements chemically combines in fixed proportion to form compounds.

5. Metals are lustrous and can be polished.

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7. Milk is a colloidal solution but vinegar is a true solution.

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3 years ago
Your friend cuts his sandwiches in half diagonally because then he gets twice as much
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Answer:

It is still one sandwich it doesn't become twice the size just because you cut it, it just becomes one sandwich cut into two

Explanation:

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3 years ago
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I WILL GIVE BRAINLIEST!
stira [4]

The correct answer is option a, that is, they produce ions when dissolved in water.  

The acids and bases refer to the chemical components, which reacts with water. The molecules of acids dissociate to give hydrogen ions to water, while the bases dissociate to provide hydroxide ions to the water, or that takes hydrogen ions from water and leave the hydroxide ions behind.  


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Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe? auau cucu mnmn agag
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Mn metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe. So, the correct option is (c) Mn.

Commonly, sacrificial electrodes are employed to stop another metal from corroding or oxidising. A metal that is more reactive than the metal being shielded must serve as the sacrificial electrode. Magnesium, aluminium, and zinc are the three metals most frequently used in sacrificial anodes.

Manganese-Magnesium (Mn-Mg) electrode is more suited for on-shore pipelines where the electrolyte (soil or water) resistivity is higher since it has the highest negative electropotential of the three. In order to replenish any electrons that could have been lost during the oxidation of the shielded metal, the highly active metal offers its electrons.

Therefore, Mn metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe. So, the correct option is (c) Mn.

Learn more about electrode here:

brainly.com/question/17060277

#SPJ4

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1 year ago
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