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Sliva [168]
3 years ago
13

Question 2 of 10

Chemistry
2 answers:
mart [117]3 years ago
8 0
D, democritus is the answer i got
Tpy6a [65]3 years ago
4 0

Answer:

The answer is D. Democritus

Explanation:

I did my research and it was Democritus' idea of the atom.

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The mass of 2.50 moles of calcium fluoride is ____ grams
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Answer:

195.187016

Explanation:

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At what temperature, would the volume of a gas
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Explanation:

P1V1 = nRT1

P2V2 = nRT2

Divide one by the other:

P1V1/P2V2 = nRT1/nRT2

From which:

P1V1/P2V2 = T1/T2

(Or P1V1 = P2V2 under isothermal conditions)

Inverting and isolating T2 (final temp)

(P2V2/P1V1)T1 = T2 (Temp in K).

Now P1/P2 = 1

V1/V2 = 1/2

T1 = 273 K, the initial temp.

Therefore, inserting these values into above:

2 x 273 K = T2 = 546 K, or 273 C.

Thus, increasing the temperature to 273 C from 0C doubles its volume, assuming ideal gas behaviour. This result could have been inferred from the fact that the the volume vs temperature line above the boiling temperature of the gas would theoretically have passed through the origin (0 K) which means that a doubling of temperature at any temperature above the bp of the gas, doubles the volume.

From the ideal gas equation:

V = nRT/P or at constant pressure:

V = kT where the constant k = nR/P. Therefore, theoretically, at 0 K the volume is zero. Of course, in practice that would not happen since a very small percentage of the volume would be taken up by the solidified gas.

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3 years ago
The magnetic field of an object exerts a force on any magnetic object around it.
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I believe the answer is true
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How could you use melting and boiling point to identify a substance
Lorico [155]
You can identify a substance, by testing the melting and boiling point and find a known substance that has the same melting and boiling points as the one tested
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Which of the following effect increases the solubility of Ca(OH)2?
mash [69]

Answer:

adding an acidic solution

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