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tatiyna
3 years ago
15

I will mark brainliest if you are correct

Chemistry
2 answers:
pantera1 [17]3 years ago
8 0
The correct answer is b
alexgriva [62]3 years ago
3 0

Answer:

The right answer to this is (b)

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In each case of a chemical reaction shown below, state the indicator of the chemical reaction. Identifying Indicators of Chemica
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Bread dough rises due to the formation of gas.

<u>Explanation:</u>

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A nonaqueous solution has a solvent that is not water. Which is an example of a nonaqueous solution?
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Write an equation that expresses the law of thermodynamics in terms of heat and work
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We write DE = q+w, where DE is the internal energy change and q and w are heat and work, respectively.

(b)Under what conditions will the quantities q and w be negative numbers?

q is negative when heat flows from the system to the surroundings, and w is negative when the system does work on the surroundings.

As an aside: In applying the first law, do we need to measure the internal energy of a system? Explain.

The absolute internal energy of a system cannot be measured, at least in any practical sense. The internal energy encompasses the kinetic energy of all moving particles in the system, including subatomic particles, as well as the electrostatic potential energies between all these particles. We can measure the change in internal energy (DE) as the result of a chemical or physical change, but we cannot determine the absolute internal energy of either the initial or the final state. The first law allows us to calculate the change in internal energy during a transformation by calculating the heat and work exchanged between the system and its surroundings.

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A sample of liquid has a mass of 24 grams and a volume of 16 mL what is the density
viktelen [127]

Answer:

<h3>The answer is 1.5 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{24}{16}  =  \frac{3}{2}  \\

We have the final answer as

<h3>1.5 g/mL</h3>

Hope this helps you

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