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galben [10]
3 years ago
13

which of the following represents a compound? a. cl2 b. n2 c. co2 d. h2 user: which of the following represents an element? a.co

2 b.co c.h2o d.n2
Chemistry
1 answer:
babunello [35]3 years ago
6 0
C. CO2 is the compound (carbon dioxide) while N2 is the element (nitrogen)
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Convection heat transfer mode is comprised of which of the following mechanism? Select one: O a. Energy transfer solely due to m
Katen [24]

Answer:

Option c.

Explanation:

Convection - transfer of heat mode is that technique of transfer of heat in which heat and thermal energy can be transferred from one point to another point in the system by the random movement of the molecules of the fluid. This method of transfer of heat or the mechanism of transfer of heat by convection is the most dominant form of transfer of heat in gases and liquids.

Therefore, we can say that convection involves the transfer of heat as a result of the macroscopic and some random movement of the fluid molecules.  

4 0
3 years ago
Why is the expectation value of the energy associated with the 1-D "particle-in-a-box" the same as the eigen value of the Hamilt
Veronika [31]

Answer: The average potential energy of the PIB is 0 irrespective of the wave function.

Explanation:

⟨H⟩=⟨KE⟩+⟨V⟩

the nn quantum number

⟨KE⟩=(π^2 ℏ^2)/(2mL^2 )

the average kinetic energy of the wavefunction is dependent on

⟨V⟩=∫sin(kx)0sin(kx)dx=0

The average potential energy of the PIB is 0 irrespective of the wave function.

⟨H⟩=⟨KE⟩=(π^2 ℏ^2)/(2mL^2 )

4 0
3 years ago
Where might you find a temperature of 2 kelvin?
lyudmila [28]
100°C is 273 kelvins.

1°C is 2.73 kelvins.

I guess the closest would be north pole
7 0
4 years ago
In general, sound travels faster through
mariarad [96]
To answer the question "What is amplitude?", first look at the context of the question. A poem is also given before the questions which discusses about sound waves. Therefore, considering the context above, amplitude is the height of the wave. 
3 0
3 years ago
A chemist adds of a sodium thiosulfate solution to a reaction flask. Calculate the mass in grams of sodium thiosulfate the chemi
schepotkina [342]

This is a incomplete question.The complete question is:

A chemist adds 180.0 ml of a 1.77 mol/L of sodium thiosulfate solution to a reaction flask. Calculate the mass in grams of sodium thiosulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Answer: 50.4 g

Explanation:

To calculate the number of moles for given molarity, we use the equation:

\text{Moles of solute}={\text{Molarity of the solution}}\times{\text{Volume of solution (in L)}}     .....(1)

Molarity of sodium thiosulfate solution = 1.77 M

Volume of sodium thiosulfate solution = 180.0 mL = 0.1800 L

Putting values in equation 1, we get:

\text{Moles of sodium thiosulfate}={1.77}\times{0.1800}=0.319moles

Mass of sodium thiosulfate = moles\times {\text {Molar mass}}=0.319moles\times 158.11g/mol=50.4g

Thus 50.4 g of sodium thiosulfate the chemist has added to the flask.

6 0
3 years ago
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