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ikadub [295]
4 years ago
6

How does a scientist explain something when a controlled experiment cannot be carried out

Chemistry
1 answer:
alina1380 [7]4 years ago
5 0
Usually the controlled experiment is the one that is not tested so they look at the experimental experiment to find the differences. Sorry if this doesn't answer your question.
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An element's atomic number is 78. How many protons would an atom of this element have?
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Answer:

78

Explanation:

atomic number is number of protons

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Explanation:

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A cylinder with a moving piston expands from an initial volume of 0.250 L against an external pressure of 2.00 atm. The expansio
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Answer:

The final volume of the cylinder is 1.67 L

Explanation:

Step 1: Data given

Initial volume = 0.250 L

external pressure = 2.00 atm

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Step 2: Definition of reversible work:

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The gas did work, so V2>V1  (volume expands) and the work has a negative sign.(Wrev<0)

V2 = (-Wrev/P)  + V1

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⇒ with P = the external pressure (in atm)

⇒ with V1 = the initial volume

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To convert from J to L * atm we should use a convenient conversion unit using the universal gas constants :

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V2 = 1.67 L

The final volume of the cylinder is 1.67 L

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3 years ago
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