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LekaFEV [45]
3 years ago
13

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Chemistry
2 answers:
loris [4]3 years ago
5 0
Yehhggbgfdrhbn hygvbjyffvhugfvbjub uhhh
NikAS [45]3 years ago
4 0

Answer:

thx for points

Explanation:

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A chemist identifies compounds by identifying bright lines in their spectra. She does so by heating the compounds until they glo
allsm [11]

Answer:

PART A: 412.98 nm

PART B: 524.92 nm

Explanation:

The equation below can be used for a diffraction grating of nth order image:

n*λ = d*sinθ_{n}

Therefore, for first order images, n = 1 and:

λ = d*sinθ_{1}.

The angle θ_{1} can be calculated as follow:

tan θ_{1}  = 9.95 cm/15.0 cm = 0.663 and

θ_{1} = tan^{-1} (0.663) = 33.56°

Thus: d =λ/sin θ_{1}  = 461/sin 33.56° = 833.97 nm

PART A:

For a position of 8.55 cm:  

tan θ_{1}  = 8.55 cm/15.0 cm = 0.57 and

θ_{1} = tan^{-1} (0.57) = 29.68°

Therefore:

λ =d*sin θ_{1}  = 833.97*sin 29.68° = 412.98 nm

PART B:

For a position of 12.15 cm:  

tan θ_{1}  = 12.15 cm/15.0 cm = 0.81 and

θ_{1} = tan^{-1} (0.81) = 39.01°

Therefore:

λ =d*sin θ_{1}  = 833.97*sin 39.01° = 524.92 nm

6 0
3 years ago
Please explain your answer! <br><br> Thanks!
Yuri [45]
Hello Gary!
*Sorry if I'm late*

Your answer is going to be 65.
Element A (which is actually Zinc) has the atomic number of 65. (I remember having got memorize this also).
Pretty much the explanation is that the number of patrons is equivalent to the element's atomic number!

Hope this helps!
Have a nice day :D
8 0
3 years ago
Read 2 more answers
A chemistry student is given 600. mL of a clear aqueous solution at 27.° C. He is told an unknown amount of a certain compound X
DiKsa [7]

Answer: No

Explanation:

Firstly, the molar mass of the dissolved solid is not given. This is necessary to calculate the number of moles present in solution. Secondly, solubility always has to do with temperature and the specified temperature is 27°c and not 21°c. This makes it impossible to calculate the solubility at 21°c. Further information must supplied before the solubility at 21°c can be accurately calculated.

8 0
4 years ago
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal,
VARVARA [1.3K]

Answer:

If it receives energy faster than it can radiate/convect/conduct it away, its temperature will increase. It does not matter.

Explanation:

6 0
3 years ago
Read 2 more answers
Which disease is caused by a living pathogen? a. common colds b. smallpox c. cholera d. influenza
liraira [26]

Answer:

Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions

7 0
3 years ago
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