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Scrat [10]
3 years ago
6

Mechanical waves don't require a medium.

Chemistry
1 answer:
Colt1911 [192]3 years ago
4 0

Answer: False. Mechanical waves cannot travel through a vacuum.

Explanation:Type of wave that can travel through the vacuum of space - DOES NOT require a medium. ... False: A vacuum is empty space (no matter). Sound waves must have a medium (matter) in order to travel. Sound waves are mechanical waves.

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Which is an example of radiation?
kondor19780726 [428]

Answer:

Heated water begins circulating in a fish tank.

Explanation:

5 0
3 years ago
Read 2 more answers
Hydrogen bromide decomposes when heated to 437C according to the equation: 2HBr(g) H2(g) Br2(g). If the reaction starts with 2.1
iren [92.7K]

Answer:

<h3>the equilibrium constant of the decomposition of hydrogen bromide is 0.084</h3>

Explanation:

Amount of HBr dissociated

2.15 \ mole \times \frac{36.7}{100} \\\\=0.789 \ mole

                                  2HBr(g)        ⇆          H2(g)           +          Br2(g)

Initial Changes          2.15                             0                                0  (mol)

                                - 0.789                      + 0.395                     + 0.395 (mol)

At equilibrium        1.361                            0.395                         0.395 (mole)

Concentration        1.361 / 1                   0.395 / 1                      0.395 / 1

at equilibrium (mole/L)

K_c=\frac{[H_2][Br_2]}{[HBr]^2} \\\\=\frac{(0.395)(0.395)}{(1.361)^2} \\\\=\frac{0.156025}{1.852321} \\\\=0.084

<h3>Therefore, the equilibrium constant of the decomposition of hydrogen bromide is 0.084</h3>
6 0
3 years ago
Why are the elements on the periodic table not arranged by mass?
Aleksandr-060686 [28]

Answer:

A. Similar elements have such different masses that this would lead to a completely random arrangement of elements.

Explanation:

Because it is the number of protons, which is identical to the atomic number, that separates different elements from each other, not the atomic mass.

7 0
3 years ago
Which water usage uses the least amount of water in a year in the United States
statuscvo [17]

Answer: a

Explanation:

Industry uses only about 18% while the others use around 70-90% of water.

YW!!! please mark branlest!!!! =^.^=

4 0
2 years ago
WHICH ONE?????????????????? Brainlest
FromTheMoon [43]

Answer:

I believe it would be C, The number of atoms in the reactants is equal to the number of atoms composing the products

Explanation:

hope this helps! :D

have a miraculous day!! <3

5 0
2 years ago
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