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pychu [463]
3 years ago
7

Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the p

osition of the object on the slide
Chemistry
2 answers:
babunello [35]3 years ago
8 0

Answer:

C

A

B

Explanation:

marshall27 [118]3 years ago
7 0

The question is incomplete, the complete question is;

Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the position of the object on the slide.

An object at position has all kinetic energy. A B or C

An object at position has all potential energy. A B or C

An object at position has about half potential energy and half kinetic energy. A B or C

Answer:

An object at position C has all kinetic energy.

An object at position A has all potential energy.

An object at position B has about half potential energy and half kinetic energy.

Explanation:

Lets take a good look at the image.

At position A, the object is stationary and we know that the energy possessed by an an object by virtue of its position is known as potential energy. Hence at A, the energy possessed by the body is all potential.

At position B, the total mechanical energy of the object becomes potential energy + kinetic energy as the object is now in motion.

At position C, the object is still in motion and the energy is all kinetic.

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A mixture of carbon dioxide and helium gases is maintained in a 7.91 L flask at a pressure of 1.42 atm and a temperature of 33 °
Crank

Answer:

The gas mixture contains 1.038 grams of helium

Explanation:

<u>Step 1:</u> Data given

Volume of the flask = 7.91 L

Total Pressure = 1.42 atm

Temperature = 33 °C

Mass of CO2 = 8.25 grams

Molar mass of CO2 = 44.01 g/mol

Molar mass of He = 4 g/mol

<u>Step 2</u>: Calculate total number moles of gas

p*V = n*R*T

⇒ p = the pressure = 1.42 atm

⇒ V = the volume = 7.91 L

⇒ n= the number of moles = TO BE DETERMINED

⇒ R = the gas constant = 0.08206 L* atm/K*mol

⇒ T = the temperature = 33 °C = 306 Kelvin

n = (p*V)/(R*T)

n = (1.42*7.91)/(0.08206 * 306)

n = 0.447 moles

<u>Step 3</u>: Calculate moles of CO2

Moles CO2 = mass CO2 / Molar mass CO2

Moles CO2 = 8.25 grams / 44.01 g/mol

Moles CO2 = 0.1875 moles

<u>Step 4:</u> Calculate moles of Helium

Moles Helium = total moles of gas - moles of CO2

Moles Helium = 0.447 - 0.1875 = 0.2595 moles of helium

<u>Step 5: </u> Calculate mass of helium

Mass of helium = moles of helium * molar mass of helium

Mass of helium = 0.2595 moles * 4 g/mol

Mass of helium = 1.038 grams

The gas mixture contains 1.038 grams of helium

8 0
3 years ago
Give three examples of environmental, industrial and bio-chemistry.
JulsSmile [24]

Three examples of environmental, industrial and bio-chemistry are listed below:

  • Environmental chemistry: Contamination, Atmospheric Deposition, and Soil Pollution.
  • industrial chemistry:  industrial inorganic chemicals, industrial organic chemicals, and agricultural chemicals
  • bio-chemistry: genetic, immunology, and enzymology

<h3>Meaning of Chemistry</h3>

Chemistry can be defined as a branch of science which is concerned with the substances matter is composed of, their properties and reactions,

Chemistry also deals with the use of such reactions to form new substances.

In conclusion, Three examples of environmental, industrial and bio-chemistry are listed anove

Learn more about chemistry: brainly.com/question/24419453

#SPJ1

4 0
2 years ago
Can someone help me here please i need this :(​
podryga [215]
Start by adding the numbers then divide
7 0
3 years ago
Sensitivity analysis is concerned with how certain changes affect
Ilia_Sergeevich [38]
The answer here is letter C. The optimal solution. The optimal solution is the one that affects how certain things changes with sensitivity analysis. The optimal solution is a feasibility solution where the objective function of it is to reach the minimum and maximum value.
8 0
3 years ago
16. If the velocity of hydrogen molecule is 5 x 10^4cm sec-¹, then its de Broglie wavelength is
Aleks04 [339]

Answer:

Correct option is B)

According to de-Broglie, 

λ=mvh=6.023×10232×5×104cm/sec6.62×10−27ergsec=4×10−8cm=4Ao

5 0
2 years ago
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