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Nat2105 [25]
3 years ago
9

Which is an unreliable source?

Chemistry
1 answer:
vodomira [7]3 years ago
6 0

Answer:

I believe CDC I s the most reliable

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If it takes 2000 years to weather 1 cm of limestone, how long will it take to weather 5 cm of limestone?
Anna71 [15]

Answer:10,0000 years

Explanation:

If it takes 2000 years to weather 1cm of limestone

It will take 5*2000 years to weather 5cm of limestone. This gives us 10000 years.

3 0
3 years ago
A solution that contains many dissolved molecules in a fixed amount of solution is called
Nezavi [6.7K]

Answer:

  • <em>A solution that contains many dissolved molecules in a fixed amount of solution is called</em> <u>concentrated</u>.

Explanation:

Solutions are homogeneous mixtures.

A solution contains at least one solute component and one solvent component all in the same phase.

The term solubility is used to express the maximum amount of solute that can be dissolved in certain amount of solvent, and is measured at a given temperature and pressure.

You may refer to a solution as <em>concentrated</em> or diluted. These are kind of vague terms, in the sense that they do not express how much solute is dissolved. They just tell if there are many dissolved particles (molecules or ions), which is expressed as concentrated, or just a few particle, which is express as diluted.

Other more specific terms used to refer the amount of solute dissolved in a solution are: unsaturated solution, saturated solution, and supersaturated solution.

<u>Unsaturated solution</u>: the solution contains less solute than what it can have. The solution may dissolve more solute.

<u>Saturated solution</u>: the solution has the maximum amount of solute that it can dissolve, at certain temperature and pressure. If you add more solute to a saturated solution, it will not get dissolved (unless you change the temperature or pressure).

<u>Supersaturated solution</u>: a special condition where the solution contains more solute than the saturated solution, at the same temperature and pressure. This is a very unstable situation and any perturbation will make that the excess solute precipitate.

4 0
3 years ago
a 280.0 mL sample of neon exerts a pressure of 660.0 toff at 26.0 celsius. at what temperture would it exert a pressure of 940.0
bixtya [17]

Answer:

T₂ = 669.2 K

Explanation:

Given data:

Initial pressure = 660 torr

Initial temperature = 26 °C (26 +273 = 299 K)

Final volume = 280 mL ( 280/1000 = 0.28 L)

Final pressure = 940.0 torr

Final volume = 0.44 L

Final temperature = ?

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₁V₁/T₁ = P₂V₂/T₂  

T₂ = P₂V₂ T₁ /P₁V₁

T₂ = 940 torr × 0.44 L  × 299 K / 660 torr × 0.28 L

T₂ = 123666. 4 torr. L. K / 184.8 torr. L

T₂ = 669.2 K

3 0
3 years ago
Acetone (C3H6O) is a liquid that is used to dissolve substances that do not mix with water. The boiling point of acetone is 56°C
serg [7]

Answer : Acetone start to condense below 56 °C

Explanation :

Boiling point : It is defined as the temperature at which vapor pressure of the liquid is equal to the atmospheric pressure of the liquid.

That means, the temperature at which the liquid changes into gas.

Condensation point : It is defined as the temperature at which the phase changes from a gaseous to liquid.

As per question, the boiling point of acetone is 56 °C. As, the gas is at 100 °C then the condensation of acetone will take place at 56 °C but below this temperature acetone exists in a liquid phase.

Hence, below 56 °C acetone start to condense.

8 0
3 years ago
I'm which of these statements are protons, electrons and neutrons correctly compared?
bearhunter [10]
Quarks are present in protons and neutrons, but not electrons; electrons are an elementary particle and thus cannot be broken down any further.
3 0
3 years ago
Read 2 more answers
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