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Licemer1 [7]
3 years ago
9

Please place correct one with statement. BRAINLIEST FOR BEST ANSWER // 60 POINTS !!

Chemistry
2 answers:
Alika [10]3 years ago
8 0

The answers are a followed;d,a,b,c,e,i,j,l,m,g,h,k,and f

Hope this helps

vfiekz [6]3 years ago
4 0
1. D
2. A
3. B
4. C
5. E
6. I
7. J
8. L
9. M
10. G
11. H
12. K
13. F
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An electron in a hydrogen atom relaxes to the n=4 level, emitting light of 74 THz.
Solnce55 [7]
Delta E = Ef - Ei
E = energy , h = plank constant  , v = frequency
h= 6.626 * 10 ^-34 j*s  ,  T = 10 ^ 12  , v = 74 * 10 ^12 Hz  ,  Hz = s^-1 

E = ( 6.626 * 10^ -34 j*s) ( 74 * 10 ^ 12 s^ -1 )  =   4.90 * 10 ^ -20 J
Delta E  = Ef  -  Ei
-4.90 * 10 ^ -20 J =  -2.18 * 10 ^ -18J ( 1/4 ^2 - 1/x ^2)
0.0225 = 0.0625 -  ( 1/x ^ 2)
0.225 - 0.0625 =  - 1/ x ^ 2 

- 0.0400 = - 1/x ^2    =   -1 / - 0.0400    =   x^2
25   =  x^2 
     x = 5 




6 0
3 years ago
Properties of carbon responsible for the pressence of millions of organic compound ​
Minchanka [31]

Answer:

Carbon has the ability to form very long chains of interconnecting C-C bonds. This property allows carbon to form the backbone of organic compounds, carbon-containing compounds, which are the basis of all known organic life. Nearly 10 million carbon-containing organic compounds are known.

5 0
3 years ago
An atom of aluminum has 13 protons and 14 neutrons. what is the atomic mass
PtichkaEL [24]
A=P +N
A=13+14
A=27 this the answer
5 0
3 years ago
Please help! <br> Fe2O3 + C → CO + Fe
Sunny_sXe [5.5K]
Fe2O3 + 3C → 2Fe + 3CO :)
3 0
2 years ago
A solid is 5 cm tall, 3 am wide, and 2 cm thick. It has a mass of 135 g. What is the solid's density?
gizmo_the_mogwai [7]

<u>Answer:</u>

density of solid = 4.5 g/cm³

<u>Explanation:</u>

density = mass ÷ volume

• We know the mass of the object (135 g). We need to calculate the volume:

Volume = length × width × thickness

             = 5 cm × 3 cm × 2 cm

             = 30 cm³

• Now we can calculate the solid's density:

density = 135 g ÷ 30 cm³

            = 4.5 g/cm³

4 0
2 years ago
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