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bogdanovich [222]
3 years ago
10

Select the correct answer.

Chemistry
2 answers:
Black_prince [1.1K]3 years ago
6 0
The answer is C. silicon , hope this helps!
Lelechka [254]3 years ago
5 0

Answer:

hf and si

Explanation:

hope that helped

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Which chemical equation represents a precipitation reaction?
GrogVix [38]

Answer:

See the answer below, please.

Explanation:

A precipitation reaction is defined as one that yields an insoluble compound (precipitate) as a product by mixing two different solutions. An example:

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The principle that predicts the magnitude of the force due to currents in a magnetic field is
slavikrds [6]
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how many moles of hydrogen are evolved when an excess of sodium metal is added to one mole of citric acid?
vova2212 [387]
The formula of citric acid is:

           CO2H
           |
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|
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I bolded the 4 hydrogens that can be subsituted by sodium.


Three of those hydrogens belong to carboxyl group (- CO2H) and one to a hydroxyl group (- OH).


You need to take into account that 4 H will form 2 H2 molecules.


So, the answer is that 2 moles of molecules will be formed from 1 mole of citric acid molecules.


   

4 0
3 years ago
“True or False”<br> Concentration of solutions can be described qualitatively and quantitatively
Ne4ueva [31]

Answer:

true

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