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Ludmilka [50]
3 years ago
14

Which solution is the most concentrated?

Chemistry
2 answers:
Gekata [30.6K]3 years ago
8 0

Answer:100 mL of 10 M NaCl, where NaCl has a molar mass of 58 g/mol

Explanation:

Concentration refers to the amount of substance in moles present in a solution. Number of moles is obtained from; number of moles= concentration*volume

For our chosen answer, 100/1000 * 10=1 mole. If we follow this procedure to calculate the amount of other solutions stated in the question, we will realize that 100ml of 10M NaCl has the highest number of moles present. Since concentration has to do with the number of moles present in a solution, this is the most concentrated solution.

katrin [286]3 years ago
4 0

Answer:

2.0 mL of 10.5 M H2O2, where H2O2 has a molar mass of 34 g/mol.

Explanation:

It is most concentrated because it contains 10.5 M of Hydrogen peroxide.

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Answer:

CaCO₃(s) → CaO(s) + CO₂(g)

Explanation:

The decomposition reaction always make two compounds from one.

The products always have simpler chemical structure, originated from a determined compound. This can happens  spontaneously or by a third party.

A notable example of decomposition is hydrolysis. As for example the case of water, which decomposes and generates oxygen and hydrogen gas

2H₂O (l) → 2 H₂ (g) + O₂ (g)

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These two, are the products of the decomposition.

Of course, the unique reactant is the Calcium Carbonate

The balanced equation is:

CaCO₃(s) → CaO(s) + CO₂(g)

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