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andre [41]
3 years ago
14

Why were microscopes essential in the discovery of cells

Chemistry
2 answers:
fredd [130]3 years ago
8 0

Answer: hey nice to see you again, the answer is B. Microscopes allowed scientists to see the cells.

Explanation:

lana66690 [7]3 years ago
8 0

Answer:

C I believe if that's wrong then it's A. :)

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Calculate the hydrogen-ion concentration [H+] for an aqueous solution in which the hydroxide-ion concentration [OH-] is 1 x 10^-
Gemiola [76]

Answer:

pH = -(log 10^-10)

= -(-10)

=10

so the solution is basic in nature

7 0
4 years ago
How many molecules are in 3.8 mols of copper?
ioda

Answer:

Hi there!

The correct answer is 2.29 x 10^{24} molecules

Explanation:

To convert from the moles to molecules:

1 mole = 6.022 x 10²³ molecules

so basically you multiply 3.8 by 6.022 x 10²³

and you get: 2.29 x 10^{24}

5 0
4 years ago
14.Which of the following exhibit maximum paramagnetic behaviour – Fe3+ or
Naddik [55]

Answer:

Fe^3+

Explanation:

The electron configuration for Fe^3+ is; 1s2 2s2 2p6 3s2 3p6 3d5

The electron configuration for Ni^2+ is; 1s2 2s2 2p6 3s2 3p6 3d8

Now it is pertinent to recall that the 3d sublevel has a maximum occupancy of ten electrons. These ten electrons occupy a set of five degenerate orbitals. Having said that, it is clear that Ni^2+ ion will have two unpaired electrons while Fe^3+ will have five unpaired electrons.

Let us also not forget that paramagnetism has to do with the presence of unpaired electrons. That means that maximum paramagnetism refers to the presence of maximum number of unpaired electrons.

Since Fe^3+ has the greatest number of unpaired electrons among the duo, Fe^3+ will exhibit a maximum paramagnetic behavior.

5 0
3 years ago
What are the 2 types of electrical charge?​
BlackZzzverrR [31]

Answer: Electric charges are of two general types: positive and negative.

Hope this helps... Stay safe and have a great day.... :D

7 0
3 years ago
1. In_____particles are in contact with each other.
Musya8 [376]

Answer:

condensed matter should be your answer

Explanation:

7 0
3 years ago
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