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tester [92]
4 years ago
15

What only happens during a chemical reaction?

Chemistry
1 answer:
tia_tia [17]4 years ago
6 0
D. is the right answer.
When you mix two things, color doesn't necessarily change.
Substances are not always formed.
Gas may not always be a product of your reaction.
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A system receives 575 ) of heat and delivers 425 ) of work. Calculate the change in the internal energy. AE, of the system.​
vfiekz [6]

Answer:

ΔE = 150 J

Explanation:

From first law of thermodynamics, we know that;

ΔE = q + w

Where;

ΔE is change in internal energy

q is total amount of heat energy going in or coming out

w is total amount of work expended or received

From the question, the system receives 575 J of heat. Thus, q = +575 J

Also, we are told that the system delivered 425 J of work. Thus, w = -425 J since work was expended.

Thus;

ΔE = 575 + (-425)

ΔE = 575 - 425

ΔE = 150 J

7 0
3 years ago
What is the volume of a box measuring 2cm by 3cm by 4cm?
grin007 [14]

I The answer is 42 cubic cm

3 0
3 years ago
Read 2 more answers
For any spontaneous process, universe entropy intensifies is known as the __________ law of thermodynamics.
FrozenT [24]

For any spontaneous process, universe entropy intensifies is known as the second law of thermodynamics.

<h3>What is entropy?</h3>

Entropy is defined as the degree of randomness or disorderliness of a system.

The entropy of a system generally increases for any spontaneous process.

This is according to the second law of thermodynamics.

In conclusion, the entropy of a system is the a measure of randomness of the system.

Learn more about entropy at: brainly.com/question/21578229

#SPJ1

4 0
2 years ago
How much of a 50g sample of 85Kr will remain after 2 half-lives?
Rashid [163]

Answer:

i need help with my work

Explanation:

8 0
3 years ago
Fritz-Haber process
maks197457 [2]

Answer:

5×10⁵ L of ammonia (NH3)

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

N2 + 3H2 —> 2NH3

From the balanced equation above, we can say that:

3 L of H2 reacted to produce 2 L of NH3.

Finally, we shall determine the volume of ammonia (NH3) produced by the reaction of 7.5×10⁵ L of H2. This can be obtained as illustrated below:

From the balanced equation above,

3 L of H2 reacted to produce 2 L of NH3.

Therefore, 7.5×10⁵ L of H2 will react to produce = (7.5×10⁵ × 2)/3 = 5×10⁵ L of NH3.

Thus, 5×10⁵ L of ammonia (NH3) is produced from the reaction.

6 0
3 years ago
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