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tigry1 [53]
3 years ago
14

HURRY FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
2 answers:
miss Akunina [59]3 years ago
8 0
B. The sand increases friction by increasing roughness.
Nat2105 [25]3 years ago
5 0

Answer:

B. The sand increases friction by increasing roughness.

  • Explanation: bc

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Which statement identifies the function of a cathode in every in every electrochemical cell
torisob [31]

The answer is B because <span>It would be useful to memorize that sentence. Once you know that, you can figure out whatever else happens at the anode, the cathode, in the solution, and in the external circuit.</span>
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What is the name of the people who hid the Dead Seas Scrolls. When did they live at Qumran?
Shkiper50 [21]
It was named the Qumran seas scrolls.
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2 years ago
What happens when a metal is reduced. Give an example of a metal being reduced
AlexFokin [52]

Answer:

The oxidation number of the metal decreases

2 Al  + Fe₂O₃ → Al₂O₃ + 2 FeO

The metal element iron, is reduced from Fe⁺³ in Fe₂O₃ to Fe⁺² in FeO

Explanation:

When an element gains electron, the element becomes reduced, hence when a metal is reduced, the metal gains electrons, which reduces the oxidation number of the metal

An example of a metal being reduced is;

2 Al  + Fe₂O₃ → Al₂O₃ + 2 FeO

In the above reaction, the iron (III) oxide is reduced to iron (II) oxide by aluminium metal.

6 0
3 years ago
GET IT RIGHT FOR BONUS
storchak [24]

Answer:

Sand

Explanation:

with salt distillation will work, heat the solution and collect the water in a seperate beaker

With sugar you do the same, boil away the water and collect the water vapour, you'll be left with sugar in the original container and water if you collected it

Use a fraction of column and heat the solution, the alcohol will be seperated out

Sand is the only one that uses mechanical filtration

5 0
3 years ago
What is the electron configuration of an element with atomic number 15?
Ghella [55]
1s to the second power, 2s to the second power, 2p to the 6th power, 3s to the second power and 3p to the third power.
4 0
3 years ago
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