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kati45 [8]
3 years ago
10

How is a mixture different from a compound? 1. Particles of a mixture are combined chem2. Components of a mixture can be sepa- r

ated by physical means. 3. Composition of a mixture may be con- stant. 4. Components of a mixture can only be separated chemically.
Chemistry
1 answer:
wariber [46]3 years ago
3 0

Answer:

2. Components of a mixture can be separated by physical means

Explanation:

The Compound is defined as the substances that are chemically combined while mixtures are the substances in which two or more compounds are physically combined together.

The difference between compound and mixture from the given options is that mixture can be separated physically unlike compounds.

In a mixture, two or more compounds can be mixed in any proportion that can be separated by physical means. For example: salt from seawater (mixture) can be separated evaporation and nails from the mixture of sand and iron can be separated through magnetic separation.

Hence, the correct answer is "Components of a mixture can be separated by physical means".

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Neutral atoms of argon, atomic number 18, have the same number of electrons as each of the following items except: Cl- S -2 K+ C
irinina [24]

Answer:

Ne.

Explanation:

Neutral argon, atomic number 18, has 18 electrons.

Cl⁻:

Neutral atom of Cl, atomic number 17, has 17 electrons.

When it gains electron and be Cl⁻, then it has 18 electrons a neutral Ar.

S²⁻:

Neutral atom of S, atomic number 16, has 16 electrons.

When it gains 2 electrons and be S²⁻, then it has 18 electrons a neutral Ar.

K⁺:

Neutral atom of K, atomic number 19, has 19 electrons.

When it losses electron and be K⁺, then it has 18 electrons a neutral Ar.

<em>Ca²⁺:</em>

Neutral atom of Ca, atomic number 20, has 20 electrons.

When it losses 2 electrons and be Ca²⁺, then it has 18 electrons a neutral Ar.

Ne:

It is a noble gas that has 10 electrons.

<em>So, the right choice is: Ne.</em>

<em></em>

3 0
3 years ago
If we know the specific heat of a material, can we determine how much heat is released under a given set of circumstances?
Alekssandra [29.7K]

Answer:

Yes

Explanation:

literally have no idea i just got it right on ck-12 lol

6 0
3 years ago
1. An acetic acid solution that is 60.0% HC2H302 (by mass) contains
d1i1m1o1n [39]

Answer:

A solution of acetic acid that is 60.0% HC₂H₃O₂ (by mass) indicates that it contains 60.0 g of acetic acid and 100.0 g of water.

Explanation:

A percentage is a way of expressing an amount as a fraction of 100. The mass percentage corresponds to physical units of the solutions and they allow to establish more precisely the concentration of the solutions and express them in terms of percentages.

Mass percentage indicates the amount in grams of solute per 100 grams of solution.

So a solution of acetic acid that is 60.0% HC₂H₃O₂ (by mass) indicates that it contains 60.0 g of acetic acid and 100.0 g of water.

7 0
3 years ago
What does the number 18.9984 represent in the image?
Yanka [14]

The element symbol in chemistry comprises atomic number and mass number.

Atomic number is written on the top of element and mass number is written at the bottom.

For eg:

If Y is an element that is having atomic number a and mass number x. Then its denotion will be:

ᵃYₓ.

So here ⁹F₁₈.₉₉

Here 18.99 will denote mass number while 9 will denote atomic number.

4 0
3 years ago
What must be true for a car to move forward at a constant speed? The forward fore of the car is....?
4vir4ik [10]
Constant. you have to continuously apply the same amount of force to achieve constant velocity 
4 0
3 years ago
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