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3 years ago

5

Reverberation in concert halls is caused by ____. a. diffraction c. diffusion b. refraction d. reflection Please select the best

answer from the choices provided A B C D

1 answer:

Tanya [424]3 years ago

6 0

It's D reflection. I found the answer on quizlet.
https://quizlet.com/127051840/chapter-12-sound-flash-cards/
That is the link to the quizlet.

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500.0 liters of a gas I'm prepared at 700 point mmHg and 200.0 C the gas is placed under a tank under high pressure when the 10

ella [17]

I would believe the answer is:

.9211 ATM

9.51 L

8 0

4 years ago

The Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In t

ICE Princess25 [194]

Answer:

42,3g of H₂O

Explanation:

For the reaction:

4NH₃(g) + 5O₂(g) ⟶ 4NO(g) + 6H₂O(g)

62,8 g of NH₃ are:

62,8g×(1mol/17,031g) = <em>3,69 moles of NH₃</em>

62,8 g of O₂ are:

62,8g×(1mol/32g) =<em> 1,96 moles of O₂</em>

For a complete reaction of 1,96 moles of O₂ you need:

1,96mol O₂×(4mol NH₃ / 5molO₂) = 1,57 moles NH₃. As you have 3,69 moles, limiting reactant is O₂.

Assuming a complete reaction, 1,96mol O₂ produce:

1,96mol O₂×(6mol H₂O / 5molO₂) = 2,35 moles of H₂O. In grams:

2,35 moles of H₂O×(18,01g/1mol) = <em>42,3g of H₂O</em>

I hope it helps!

3 0

3 years ago

Complete the analogy solid:Table:.......water

prisoha [69]

Answer:

of

Explanation:

4 0

3 years ago

The radioactive substance cesium-137 has a half-life of 30 years. The amount At (in grams) of a sample of cesium-137 remaining a

stealth61 [152]

<u>Answer:</u> The amount of sample left after 20 years is 288.522 g and after 50 years is 144.26 g

<u>Explanation:</u>

We are given a function that calculates the amount of sample remaining after 't' years, which is:

$A_t(t)=458\times (\frac{1}{2})^{\frac{t}{30}$

<u>For t = 20 years</u>

Putting values in above equation:

$A_t(t)=458\times (\frac{1}{2})^{\frac{20}{30}$

$A_t(t)=288.522g$

Hence, the amount of sample left after 20 years is 288.522 g

<u>For t = 50 years</u>

Putting values in above equation:

$A_t(t)=458\times (\frac{1}{2})^{\frac{50}{30}$

$A_t(t)=144.26g$

Hence, the amount of sample left after 50 years is 144.26 g

6 0

4 years ago

If a substance cannot be separated <br> physically it is?

MArishka [77]

Its an element Im pretty sure

3 0

3 years ago

Read 2 more answers