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faust18 [17]
2 years ago
13

If I had a mixture of salt, sand, and iron filings I could separate the mixture by …

Chemistry
1 answer:
liubo4ka [24]2 years ago
3 0
Okay to separate this mixture you will have to first use a magnet because the magnet will attract the iron filings out of the sand then you will remain with the sand and salt.

Next step is to add water to the sand and salt mixture the salt will dissolve in the water and the sand will not forming a heterogeneous mixture.Then using the method of filtration you can separate the sand from  the salt solution leaving the salt solution

 To separate the salt from the water use the method of evaporation this will enable you to get back the salt 

In the end you should beable to have the sand,salt and iron filings separate.

Hope this was helpful to you.

Happy New Years !!! May your year be prosperous 






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Solar energy converts ___ into either ___ energy or electrical energy.
IceJOKER [234]

Answer:

Hey mate....

Explanation:

This is ur answer.....

<h2>Solar radiation can be converted either into thermal energy (heat) or into electrical energy.</h2>

Hope it helps!

mark me brainliest plz......

Follow me! :)

4 0
2 years ago
Read 2 more answers
Select the compound that is most likely to increase the solubility of ZnSe when added to water.NaCnMgBr2NaClKClO4
vlada-n [284]

Answer:

NaCl.

Explanation:

In the solution, ZnSe ionizes to Zn^2^+ and Se^2^- . Following reaction represents the ionization of ZnSe in solution -

ZnSe ⇄ Zn^2^+ + Se^2^-

As we want to increase the solubility of ZnSe, we must decrease the concentration of dissociated ions so that the reaction continues to forward direction.

If we add NaCl to this solution, then we have Na^+ and Cl^- in the solution which will be formed by the ionization of NaCl.

Now, Zn^2^+ in the solution will react with two Cl^- ions to form ZnCl_2 as follows -

Zn^2^++2Cl^- ⇄ ZnCl_2

Due to this reaction the concentration of Zn^2^+ will decrease in the solution and more ZnSe can be soluble in the solution.

6 0
2 years ago
Adding/ removing
masya89 [10]

Answer:

False- The number of electrons does not affect the type of element.

Explanation:

The adding/removing of protons is what changes the type of element. for example, if you have a molecule of Boron, which has 5 protons, and you add one proton, you will have created a carbon molecule with 6 protons. The number of protons of an element is its atomic number. Elements can have varying numbers of both electrons and neutrons without changing the type of element.

3 0
3 years ago
Negative ions are usually formed from: metals nonmetals
Lelechka [254]
Non metals are electronegative in nature whereas metals are electropositive. A non-metal accepts electron and gains negative charge whereas metals lose eletrons and gains positive charge. Hence correct answer is non-metals. Hope this helps!
3 0
3 years ago
Read 2 more answers
Mr. Avogadro has 20 grams of radioactive Pa-234. How many atoms of Pa-234 does Mr. Avogadro have? PLEASE HELP WILL MARK BRAINLIE
jolli1 [7]

Answer:

The number of atoms in 20 grams of Pa-234 is 5.14 ×10²² atoms

Explanation:

Given that the molar mass of Pa-234 (protactinium) is 234.04331, we have

The number of moles of protactinium in 20 grams of Pa-234, we have

Number of moles = Mass/(Molar mass) = 20/234.04331 = 0.0855 moles

One mole of Pa-234 contains 6.02×10²³ atoms, therefore, we have;

0.0855 moles of Pa-234 contains 0.0855× 6.02×10²³  = 5.14 ×10²² atoms

Therefore, the number of atoms in 20 grams of Pa-234 = 5.14 ×10²² atoms.

6 0
3 years ago
Read 2 more answers
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