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marshall27 [118]
3 years ago
7

Which of the following is a precipitation reaction?

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

Answer:

B is a precipitation reaction.

Explanation:

This is because a precipitation reaction is when a solid is made from the combination of cations and anions in a solution to create a solid.

suter [353]3 years ago
3 0

Answer:

b. 2 NaI_{(aq)} + Hg_2(NO3)_{2(aq)} ---> Hg_2I_{2(s)} + 2 NaNO_{3(aq)}

Explanation:

<em>Precipitation reaction is a form of chemical reaction in which an insoluble salt (a precipitate) is formed from an aqueous mixture of two soluble salts.</em>

This thus means that:

  • The two reactants in a precipitate reaction must be in aqueous forms
  • At least, one of the products must be a solid (precipitate)

From all the options, only option b fulfills the conditions for a precipitate reaction.

The correct answer is b.

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Non of the above because protons and neutrons don’t mix with each one there
3 0
2 years ago
We can prove a theory to be correct by performing the right experiment. False or true
eimsori [14]

Answer:

true

Explanation:

because if you find the right answer that proves the theory to be correct.  

4 0
3 years ago
Why must each atom of an element always have the same number of protons?
Yuliya22 [10]
Atoms do not always contain the same number of electrons and protons, although this state is common. When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral. In contrast, when an atom loses or gains an electron (or the rarer case of losing or gaining a proton, which requires a nuclear reaction), the total charges add up to something other than zero.
8 0
3 years ago
In the equation KClO3 -&gt; KCl + O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decomposes completely?
IceJOKER [234]

Answer:

4.5

Hope this helps!

6 0
3 years ago
Read 2 more answers
Student A performed gravimetric analysis for sulfate in her unknown using the same procedures we did . Results of her three tria
soldi70 [24.7K]

Answer:

The answer is Sodium Sulfate = Na2SO4  

Explanation:

Molar mass of sulfate = 1 (S) + 4 (O) = 1 (32) + 4 (16) = 32 + 64 = 96  

Molar mass of sodium sulfate = 2 (23) + 96 = 46 + 96 = 142  

% of Sulfate = (96/142)*100 = 67.6%  

Percent mistake in Studen A,  

(I) % mistake = (67.6 - 68.6)/67.6 = 1.48  

(ii) % mistake = (67.6 - 66.2)/67.6 = 2.07  

(iii) % mistake = (67.6 - 67.1)/67.6 = 0.74  

For understudy B  

(I) % mistake = (67.6 - 66.7)/67.6 = 1.33  

(ii) % mistake = (67.6 - 66.6)/67.6 = 1.48  

(iii) % mistake = (67.6 - 66.5)/67.6 = 1.63  

Sutdent An is some how exact.  

Understudy B is exact however not precise.

8 0
3 years ago
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