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lesya692 [45]
3 years ago
7

cite specific situation that you experienced at home or in school where magnet used to seperate mixtures?​

Chemistry
1 answer:
Bess [88]3 years ago
5 0

Answer:

See explanation

Explanation:

On a certain day, our teacher came to class with a container having some salt, some sand and a few pieces of iron in it. She was about to introduce a lesson on separation of mixtures.

Then she held a large bar magnet close to the mixture and shook it, the pieces of iron were attracted by the magnet and separated from the mixture.

Next, she poured some water into the mixture and the salt dissolved. She got a filter paper and separated the solution from the sand.

Then she heated the solution to dryness in an open crucible and the salt was recovered.

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2. Will calcite scratch feldspar? Why or why not?
ahrayia [7]

Answer: No

Explanation: The reason for this is because calcite has a hardness of 9 while feldspar has a hardness of 21. Calcite can scratch Gypsum which has  a hardness of 3.

7 0
4 years ago
Draw a Lewis structure for SO2 in which all atoms have a formal charge of zero. Explicitly showing the zero charges is optional.
Radda [10]

Answer:

See explanation and image attached

Explanation:

"A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity" (chemlibretext).

We can obtain the formal charge from the formula;

Formal Charge = [number of valence electrons on atom] – [non-bonded electrons + 1/2number of bonds].

A structure in which SO2 has a zero formal charge is attached to this answer.

Image credit: Chemtopper

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3 years ago
Write the electron configuration​
ycow [4]

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8 0
3 years ago
Why does hydrogen naturally form diatomic molecules (H2), whereas helium exists as a single atom (He)?
Dimas [21]

Answer:

Hydrogen is a very reactive element. It doesn't exist as a single atom in nature. Neither do any of the other binary nonmetals -- nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. They're too prone to react with something. They react with each other and form binary molecules because the binary molecules are more stable than single atoms (by a lot!). Compounds with other atoms are even more stable, so hydrogen reacts with oxygen to form water, and chlorine reacts with sodium to form table salt.

Explanation:

5 0
3 years ago
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