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Mnenie [13.5K]
3 years ago
15

Which statement is most accurate?

Chemistry
2 answers:
Anna [14]3 years ago
7 0
The optical density of a medium is not the same as its physical density. ... The more optically dense that a material is, the slower that a wave will move through the material<span>. ...</span>
FinnZ [79.3K]3 years ago
5 0
I'm pretty sure the answer is D. the more optically dense the material, the higher the refractive index. Sorry if this is wrong.
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Q Q 3. (08.02 MC)
AnnyKZ [126]

Answer: A volume of 455 mL from 0.550 M KBr solution can be made from 100.0 mL of 2.50 M KBr.

Explanation:

Given: V_{1} = ?,         M_{1} = 0.55 M

V_{2} = 100.0 mL,        M_{2} = 2.50 M

Formula used to calculate the volume of KBr is as follows.

M_{1}V_{1} = M_{2}V_{2}

Substitute the values into above formula as follows.

M_{1}V_{1} = M_{2}V_{2}\\0.55 M \times V_{1} = 2.50 M \times 100.0 mL\\V_{1} = 455 mL

Thus, we can conclude that a volume of 455 mL from 0.550 M KBr solution can be made from 100.0 mL of 2.50 M KBr.

7 0
3 years ago
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Svetllana [295]

Answer:

A, D, E

Explanation:

4 0
2 years ago
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How many moles of Al2O3 can be formed from 10.0 g of Al?
Nutka1998 [239]

Answer:

n Al=  10/27( mol)- >n Al2O 3 =5/27(mol)

Explanation:

3 0
2 years ago
True or False : An object can be in motion and not in motion at the same time depending on which frame of reference you are comp
marshall27 [118]

Answer:

True

Explanation:

Yes I agree object can be in motion and in not motion at the same time for example there are two men travelling on the bus one person is A another person is B. the person be B rest so by seeing person be the person A also sits but the person see who saw the person be B move along with person C so the the person be B is in rest for person Abut is motion for a person C.

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2 years ago
What do we know about elements with half-filled energy levels??
lisabon 2012 [21]
If the energy level of a certain element is filled based on the maximum number of allowable electrons per level, then it is no longer reactive. With this, half-filled energy level means that the element may retain those electrons and attract electrons from other elements or it may give off its electrons. 
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