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Natasha2012 [34]
3 years ago
6

*

Chemistry
1 answer:
Marta_Voda [28]3 years ago
5 0

Answer:

proton. neutrons and electrons

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The geometry of a ______________ makes it a very stable shape.
boyakko [2]

Answer:

triangles

Explanation:

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2 years ago
: How does the solubility of a solid in a liquid depend on temperature? How is this temperature dependence exploited to purify s
ehidna [41]

Answer:

Explanation:

Solubility of many solid in a solvent increases with increase in temperature. Increase in temperature increases kinetic energy of the solute, increasing collision and weakens the intermolecular force within the solute. This makes the solute dissolve faster in their solvents.

During recrystallization, more solutes are added to the solvent at higher temperature so that a supersaturated solution is produced on cooling. As the solution cools the over saturated solute begins to precipitate out of the solution.

Recrystallization is a form of purification if solid, as the crystalline solids continue to precipitate it reject impurities are comes out as a purer solid

3 0
3 years ago
» How could a scientist determine on a molecular level whether a chemical reaction has occurred? A. They could see whether atoms
Leto [7]
I think the answer is A
4 0
3 years ago
Elias observed a sample in the classroom. The sample was a liquid at room temperature. He performed a conductivity test and foun
marusya05 [52]

Answer:

C) nonmetal

Explanation:

Given;

The sample is in liquid state and do not conduct electricity.

We have given four types of classification.So for first,

A) Ionic

Ionic compounds are found in solid state at room temperature and it conducts electricity when dissolved in water. Hence the sample could not be ionic.

B)Metal

Metals are found in solid state at room temperature  except mercury and it conducts electricity very well. Mercury also conducts electricity.So the sample is not a metal.

C)Nonmetal

Non metals are found in solid state  except bromine which is in liquid state  at room temperature and it does not conducts electricity.

Here the property of nonmetal matches with the sample, so the sample is a nonmetal and it could be Bromine.

D)Salt

Salt is an ionic compound  found in solid state at room temperature and it conducts electricity when dissolved in water. Hence the sample could not be salt.

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3 years ago
What is the result of adding (2.5 x10^3) +(3.5x10^2)
weeeeeb [17]
The answer would be 2,850
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3 years ago
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