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Art [367]
3 years ago
8

Please help I’ll mark brainliest!

Chemistry
2 answers:
IRISSAK [1]3 years ago
8 0
I believe you got the correct answer D.

I actually looked up the problem on quizlet. It reads, “because each element has a different set of emission colors from the emission spectrum. They have different energy level spacing and when the electrons get excited, they go to different energy levels because of the different spacing.”

If u want to view where I got this answer from, go to quizlet and type up Flame Test Lab. There should be 8 terms in the set.

Anyways, I hope that this helps! Have a wonderful day :)
Anni [7]3 years ago
6 0

Answer:

D because excited electrons fall back.....

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PLEASE ANSWER
Makovka662 [10]

Answer:

Answer is D

Explanation:

xrays would be far more efficient at detecting objects through solids.

8 0
3 years ago
Which is a nervous system test?
Elza [17]

Answer:

Sorry, is there supposed to be an attachment, If so kindly republish your Question.

3 0
3 years ago
Please help me I really need help
Mars2501 [29]

Answer:

c

Explanation:

chemically changed

hope it helps!!

8 0
3 years ago
Read 2 more answers
Is fluber liquid or solid
Gennadij [26K]
Nor liquid or solid since flubber is like oobleck, it is a non newtonian object.
3 0
2 years ago
Read 2 more answers
Determine the root-mean square speed of CO2 molecules that have an average kinetic energy of 4.2 x10-21 J per molecule.
strojnjashka [21]
<span>Determine the root-mean-square sped of CO2 molecules that have an average Kinetic Energy of 4.21x10^-21 J per molecule. Write your answer to 3 sig figs.
</span><span>
E = 1/2 m v^2 

If you substitute into this formula, you will get out the root-mean-square speed. 

If energy is Joules, the mass should be in kg, and the speed will be in m/s. 

1 mol of CO2 is 44.0 g, or 4.40 x 10^1 g or 4.40 x 10^-2 kg. 

If you divide this by Avagadro's constant, you will get the average mass of a CO2 molecule. 

4.40 x 10^-2 kg / 6.02 x 10^23 = 7.31 x 10^-26 kg 

So, if E = 1/2 mv^2 

</span>v^2 = 2E/m = 2 (4.21x10^-21 J)/7.31 x 10^-26 kg = 115184.68 
Take the square root of that, and you get the answer 339 m/s.
8 0
3 years ago
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