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steposvetlana [31]
3 years ago
6

Classify the following reaction: 2H2O 2H2 + O2

Chemistry
2 answers:
Likurg_2 [28]3 years ago
6 0
Synthesis i do believe 

strojnjashka [21]3 years ago
5 0

The answer is: C. decomposition.

Decomposition is reaction where one substance is broken down into two or more simpler substances.

Balanced chemical reaction of water decomposition: 2H₂O → 2H₂ + O₂.

This is decomposition reaction, because from one molecule (water) two molecules (hydrogen and oxygen) are produced.

Chemical decomposition is opposite of chemical synthesis.

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the solid particles take up the intermolecular spaces in the liquid.

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A 2.00-g sample of a large biomolecule was dissolved in 15.0 g carbon tetrachloride. the boiling point of this solution was dete
Katarina [22]
We will use boiling point formula:

ΔT = i Kb m 

when ΔT is the temperature change from the pure solvent's boiling point to the boiling point of the solution = 77.85 °C - 76.5 °C = 1.35

and Kb is the boiling point constant =5.03

and m = molality 

i = vant's Hoff factor

so by substitution, we can get the molality:

1.35 = 1 * 5.03 * m

∴ m = 0.27

when molality = moles / mass  Kg

           0.27 = moles /  0.015Kg

∴ moles = 0.00405 moles

∴ The molar mass = mass / moles
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5 0
3 years ago
Instead of 6 M NaOH being added to the solution, 6 M HCl is added. How will this affect the test for the presence of ammonium io
Lera25 [3.4K]

Answer:

Ammonia gas(an alkaline gas with characteristics of choking or irritating smell) is not liberated when 6mole of HCl is added to the solution instead of 6mole of NaOH, to test for the presence of ammonium ion in the solution

Explanation:

As expected, when testing for ammonium ion in a solution (precisely ammonium salt solution), Sodium Hydroxide (NaOH) is required as the test reagent.

When NaOH is added to the solution, A gas with characteristics of choking or irritating smell is liberated.

This gas turn red litmus paper blue.

This liberated gas is an alkaline gas, which is confirmed as an ammonia gas(NH3).

If HCl is added instead of NaOH, the ammonia gas will not be liberated, which indicates that the test reagent used is wrong.

3 0
3 years ago
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