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shepuryov [24]
3 years ago
9

Explain why the several different types of microscopes are all necessary.

Chemistry
1 answer:
givi [52]3 years ago
4 0
The different types of microscopes are all necessary because not all experiments require the same level of magnification. For dissections low magnification is sufficient, so a dissecting microscope works very well, while for viewing single cells the 1000 fold magnification of a compound light microscope is more accurate.
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N2 + 3H2 → 2NH3
lana66690 [7]

 The number of  moles  of H₂ that are needed  to react with 2.0  moles of N₂  is    6.0 moles


 <u><em>calculation</em></u>

N₂  +3H₂→   2NH₃

The moles of  H₂  is  calculated  using the mole ratio

That is from equation above  N₂:H₂  is 1 :3

therefore the moles of  H₂ = 2.0  moles  x (3/1) = 6.0 moles

4 0
3 years ago
What information about elements can be collected from the periodic table?
Lostsunrise [7]

Answer:

A lot

Explanation:

- As you go down a group, the elements get larger in size

- All of the elements of the same group have the same # of valence electrons

- As you go to the right of a period, the # of electrons in the outermost shell increases

- The elements at the top right of the table have the highest electronegativity

- Groups 13 through 17 are nonmetals

- The last group contains noble gases

etc.

8 0
3 years ago
When sodium atoms (Na) and chlorine atoms (CT) join to make sodium chloride, or table salt, they form an ionic bond, Using this
jasenka [17]

Answer:

D I'm pretty sure.

Explanation:

I'm taking the quiz right now and D makes the most sense.

3 0
3 years ago
Read 2 more answers
When you do physical exercise, the _____ energy stored in the carbohydrate, fat, and other molecules in the cells of your body i
Harman [31]
Potential energy is stored. As an item sits and does not move, potential energy builds up until said item moves, then it uses kinetic energy
6 0
3 years ago
The Cr 3+ ion forms octahedral complexes with three neutral ligands X, Y, and Z. The color of CrX 6 3+ is blue; the color of CrY
sergeinik [125]

Answer:The statement which is false is d

Explanation:

The color which we  see from our eyes is basically the complementary color of wavelength of light which is absorbed.

The wavelegth of light follows the following sequence:

Violet<Indigo<Blue<Green<Yellow<Orange<Red.

So the shortest wavelegth is of violet light and longest wavelength of light is Red.

Since energy is E=hv=hc/λ ;So energy is inversely related with wavelegth and hence

For ligand X the complex has blue color and so we can ascertain that ligand X would have absorbed the Red light as the complementary color of blue light is Red.So the complex of ligand X absorbs the longest wavelegth and hence  the energy gap between the two split d-orbitals t2g and eg  would be very less. Larger the energy gap between t2g and eg orbitals more stronger is the ligand .

So X would be a weak field ligand.

For ligand Y the complex has yellow color and so we can ascertain that ligand Y would have absorbed the Violet  light as the complementary color of yellow light is  violet. Violet has the lowest wavelegth and hence  the energy gap between the two split d-orbitals t2g and eg  would be very large. Larger the energy gap between t2g and eg orbitals more stronger is the ligand .

So Y is a strong field ligand.

For ligand Z the complex has red color and so we can ascertain that ligand Z would have absorbed the blue  light as the complementary color of red light is  blue.The wavelegth of  blue light lies between  violet and red hence  the energy gap between the two split d-orbitals t2g and eg  would be  in between than the other two liagnds.

So Z would be moderate field ligand.

options A , B and C are correct statements.

option D is incorrect because Z absorbs the moderate wavelegth.

The answer is d as it is only statement which is incorrect.

6 0
3 years ago
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