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serious [3.7K]
3 years ago
11

What are moles in chemistry?

Chemistry
2 answers:
vlabodo [156]3 years ago
6 0

Answer:

one mole is equal to approximately 6.022 x 10^23 particles (this can be anything, really, though most often it will be atoms or molecules).

Explanation:

Firlakuza [10]3 years ago
3 0
A mole is a unit to describe an amount of something/specific substance. Typically standard for measuring a large quantity of small entities like atoms, molecules, or other particles.
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In a heat engine, 700 J of heat enters the system, and the piston does 400 J of work. What is the final internal (thermal) energ
Vitek1552 [10]

The first law of thermodynamics characterises the two types of energy transfer, as heat and as thermodynamic. The final internal (thermal) energy of the system is 1,500 J.

<h3>What is internal energy?</h3>

The energy present in a system itself for conducting reactions is called internal energy.

Given,

  • Heat entering system (Q) = 700 J
  • Work done by the piston (W) = 400
  • Initial energy (\rm U_{1})= 1200 J

According to the <u>first law of thermodynamics</u>:

\rm Q = \Delta U + W

Substituting values in the above equation:

\begin{aligned}\rm Q &= \rm U_{2} - U_{1} + W\\\\\rm U_{2}  &= \rm Q - W + U_{1}\\\\\rm U_{2}  &= 700 - 400 + 1200\\\\&= 1500 \;\rm J\end{aligned}

Therefore, option D. 1500 J is the final energy.

Learn more about internal energy here:

brainly.com/question/2602565

4 0
2 years ago
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Texas ranks __________ among the states in the amount of hazardous waste generated, carbon dioxide emissions, and toxic chemical
Tcecarenko [31]
Texas racked the first spot in the ranking of states that is characterized as the state with the most amount of waste generated, carbon dioxide emissions, generally environmentally toxic wastes being emitted to the atmosphere. This is caused by numerous human activities as well as the chemical plants present in the state.
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3 years ago
What is the temperature of water when baking soda and citric acid is mixed with it?
asambeis [7]

Answer:

brainly.com/question/18996619?answering=true&answeringSource=feedPublic%2FhomePage%2F7

Explanation:

brainly.com/question/18996619?answering=true&answeringSource=feedPublic%2FhomePage%2F7

brainly.com/question/18996619?answering=true&answeringSource=feedPublic%2FhomePage%2F7

brainly.com/question/18996619?answering=true&answeringSource=feedPublic%2FhomePage%2F7

brainly.com/question/18996619?answering=true&answeringSource=feedPublic%2FhomePage%2F7

brainly.com/question/18996619?answering=true&answeringSource=feedPublic%2FhomePage%2F7

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3 years ago
A researcher recorder that a chemical reaction require 2.90 gal water and raised the temperature of the reaction vessel by 57°F.
Ivan

Answer:

10.875L

Explanation:

The problem here is a simple conversion. The conversion is from gal to liters Liter is a SI unit for recording volume as stated in the problem.

Given that:

              1 gallon of water = 3.75L

              2.90 gallon will be 2.9 x 3.75; 10.875L

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Sorry for disrespecting you but i don't know your language. I want to help but my problem is your language IM SO SORRY

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