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ch4aika [34]
2 years ago
13

1)Explain why the overall charge of a nucleus positive ?

Chemistry
1 answer:
yanalaym [24]2 years ago
4 0
The charge of a nucleus is positive because protons are found inside the nucleus while electrons are on shells outside of it. there are three terms because of the different locations of the electrons and what they do. ex. shielding electrons shield the valence electrons from the strong pull of the nucleus
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2 years ago
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77julia77 [94]

Answer:

Explanation:

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6 0
3 years ago
What does condensation mean in the water cycle?
tester [92]
Condensation<span> is the process by which </span>water<span> vapor in the air is changed into liquid </span>water<span>. </span>Condensation<span> is crucial to the </span>water cycle<span> because it is responsible for the formation of clouds. ... </span>Condensation<span> is the opposite of evaporation.</span>
4 0
3 years ago
Read 2 more answers
Determine whether or not each ion contributes to water hardness.
Virty [35]

Answer: The ion that contribute to water hardness are:

--> a. Ca2+

--> b. (HCO)3^- and

--> c. Mg2+

While K+ DOES NOT contribute to water hardness.

Explanation:

WATER in chemistry is known as a universal solvent. This is so because it is polar in nature and dissolves most inorganic solutes and some polar organic solutes to form aqueous solutions. It is composed of elements such as hydrogen and oxygen in the combined ratio of 2:1.

Water is said to be HARD if it does not lather readily with soap. There are two types of water hardness:

--> Permanent hardness: This is mainly due to the presence of CALCIUM and MAGNESIUM ions in the form of soluble tetraoxosulphate(VI) and chlorides. These ions are removed by adding washing soda or caustic soda.

--> Temporary hardness: This is due to the presence of calcium HYDROGENTRIOXOCARBONATES. It can be removed by boiling and using slaked lime.

Therefore from the above given ions, Ca2+,(HCO)3^- and Mg2+ contributes to water hardness.

4 0
2 years ago
. Calculate the number of moles in 56g of H20
svetoff [14.1K]
<h3>Answer:</h3>

3.11 moles

<h3>Explanation:</h3>

We are given 56 g of water (H₂O)

Required to calculate the number of moles of water.

  • The relationship between moles, mass and molar mass is given by;
  • Moles = Mass ÷ molar mass

in this case;

  • Mass of water = 56 g
  • Molar mass of water = 18.02 g/mol

Therefore;

Moles of water = 56 g ÷ 18.02 g/mol

                         = 3.11 moles

Therefore, moles of water in 56 g will be 3.11 moles

8 0
2 years ago
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