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dmitriy555 [2]
3 years ago
8

Why do you think learning about how atomic theory has evolved is important?

Chemistry
1 answer:
tatuchka [14]3 years ago
6 0
I feel like it is important, because it is always nice to learn about new things and keep your mind open, to expand your knowledge.
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Predict the sign of ΔSsys for each of the following processes. Which are positive? (a) Gasoline vapors mix with air in a car eng
OLEGan [10]

Answer:

Positive: a and b

Negative: c

Explanation:

The entropy (S) is the measure of the randomness of the system, and it intends to increase. The randomness can be determined by the energy of the molecules, their velocity and how distance they are between the other molecules.

When the entropy increases, ΔS is positive, when the entropy decreases, ΔS is negative. So, when gasoline mix with air in a car engine, the process intends to continue, the randomness increases and ΔS is positive. When hot air expands, the distance between the molecules increases, so ΔS is positive.

But, when humidity condenses, the molecules stay closer, so there's a decrease in the randomness, then ΔS is negative.

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3 years ago
What role does heat energy from the sun play influencing ocean currents
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The sun heats up the atmosphere at the equator. The dense water sinks under and forms deep water masses under the ocean current. Then it gets wind due to the air current and this brings currents at the surface if the ocean.

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Is rain chemical or mechanical weathering?
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Answer: Creating a biodegradable trash bag

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Determine the density of chunk of lead that has a mass of 1055 grams and a volume of 93.4 cm^3
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  • Mass=0155g
  • Volume=93.4cm^3

\\ \tt\longmapsto Density=\dfrac{Mass}{Volume}

\\ \tt\longmapsto Density=\dfrac{1055}{93.4}

\\ \tt\longmapsto Density=11.29g/cm^3

7 0
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