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Svetllana [295]
3 years ago
13

MARK BRAINLIEST AND 14 POINTS

Chemistry
2 answers:
LekaFEV [45]3 years ago
4 0

Answer:

She could prove that it is a combination of substances by looking for a change in color, or the formation of bubbles. She could also try to pull the combination apart by physical means alone.

Explanation:

zysi [14]3 years ago
3 0

Answer:

If it's a mixture she could pull it apart bit by bit, but she can't so it's chemical..

Explanation:

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What types of substances would definitely be good conductors?
serious [3.7K]

Answer: Ionic substances would be good conductors since they dissolve in water and form ions.

Explanation:

Conductors can be defined as those materials which can allow the electricity to flow through them. The conductors also allow the transmission of heat and light from one to another source. They conduct electricity by allowing the electrons to flow through them easily.

The ionic substances can be good conductors because these can be dissolved in water and they will produce ions. The positively-charged ions will be attracted towards the negative electrode whereas the negatively charged ions to the positive electrode.

7 0
3 years ago
Suppose that you are a scientist who studies climate changes. While examining the rings of tree trunks, you notice several very
alexandr1967 [171]

Answer:

The climate was wet and cold

Explanation:

8 0
3 years ago
Read 2 more answers
At constant pressure and 25^0C , a sample of gas occupies 4.5lit. at what temperature will the gas occupy 9.0lit.​
olga55 [171]

Answer:

Final temperature = 149 K

Explanation:

Given data:

Initial temperature = 25°C (25+273 = 298 K)

Initial volume = 4.5 L

Final temperature = ?

Final volume = 9.0 L

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂/V₁  

T₂ = 4.5 L × 298 K / 9.0 L

T₂ = 1341 L K / 9.0L

T₂ = 149 K

4 0
3 years ago
I NEED HELP FAST, BRAINLIEST! :)
castortr0y [4]

Answer:

decrease is the answer i think

Explanation:

5 0
3 years ago
What sort of relationship is there between the molarity and the absorbance? What evidence is there for this claim?
nasty-shy [4]

The molarity of a solution is typically directly related to its absorption. This relationship is expressed through the Beer-Lambert law, and can be written as A=ecl. This is usually used in spectroscopy and research.

Hope this helps!

8 0
3 years ago
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