Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical

What is the average de Broglie wavelength of oxygen molecules in air at a temperature of 27°C? Use the results of the kinetic th

asambeis [7]

Answer:

$\lambda = 2.57 \times 10^{-11} m$

Explanation:

Average velocity of oxygen molecule at given temperature is

$v_{rms} = \sqrt{\frac{3RT}{M}}$

now we have

M = 32 g/mol = 0.032 kg/mol

T = 27 degree C = 300 K

now we have

$v_{rms} = \sqrt{\frac{3(8.31)(300)}{0.032}$

$v_{rms} = 483.4 m/s$

now for de Broglie wavelength we know that

$\lambda = \frac{h}{mv}$

$\lambda = \frac{6.6 \times 10^{-34}}{(5.31\times 10^{-26})(483.4)}$

$\lambda = 2.57 \times 10^{-11} m$

7 0

3 years ago

The park has added two more cars to the already existing roller coaster. If the park wants to maintain the speed of the roller c

vredina [299]

D because friction will slow it down going up hills (for safety reasons) and you go really fast going down.

7 0

3 years ago

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As a summer intern assigned to the Olympics Kayaking committee, you need to determine the speed of water flowing through a rapid

Nookie1986 [14]

Answer:

11.56521 m/s

Explanation:

$A_1$ = Area of first section = $14\times 2$

$A_2$ = Area of second section = $5\times 0.92$

$V_1$ = Velocity in first section = 1.9 m/s

$V_2$ = Velocity in second section

From the continuity equation we get

$A_1V_1=A_2V_2\\\Rightarrow V_2=\dfrac{A_1V_1}{A_2}\\\Rightarrow V_2=\dfrac{14\times 2\times 1.9}{5\times 0.92}\\\Rightarrow V_2=11.56521\ m/s$

The speed of the river through the section of rapids is 11.56521 m/s

5 0

3 years ago

According to Chapter 18, explain why a purple flower appears purple when white light shines on it.

ahrayia [7]

The flower absorbs purple light

4 0

3 years ago

Read 2 more answers

What criteria might be used to establish someone as an expert witness?

Gala2k [10]

The criteria someone has to have to establish themselves as an expert witness to offer evaluations of the evidence due to their training and specialized <span>scientific knowledge which is what makes forensic scientists expert witnesses</span>

7 0

4 years ago