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viva [34]
3 years ago
12

______ reactions release energy.

Chemistry
1 answer:
Igoryamba3 years ago
4 0
Combustion reactions release energy in the form of heat. 
        Hope this helps and tell me if you need more help!
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A certain amount of gas is trapped in a nonrigid container at atmospheric pressure. If the container is cooled and the gas in th
GalinKa [24]
<h2>Answer:Volume of the container will decrease</h2>

Explanation:

Given that the gas is trapped,so the gas cant escape.

The number of moles of gas inside the container will remain constant.

The initial and final pressures are the same.

So,pressure can be taken as constant.

Charles law states that at constant temperature,volume of a system is directly proportional to the temperature of the system.

Since the temperature is lowered,volume also decreases.

4 0
3 years ago
What is the chemical propreties of acids
Klio2033 [76]

Answer:

Magnesium reacts in strong and weak acids.

Explanation:

Acid solutions also, have pH values, less than 7. This is the correct answer, to this question.

Hope this helps!!!

Kyle.

8 0
3 years ago
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Helpppppppppppp!!!!!!!!
atroni [7]

The answer is D.) +0.34 V

6 0
3 years ago
What is the molar concentration (molarity) of a solution made by dissolving 0.285 moles of CaCl2(s) in just enough water to form
marusya05 [52]

Answer:

The answer to your question is Molarity = 0.238

Explanation:

Data

Molarity = ?

number of moles = 0.285

volume = 1.2 L

Molarity is a unit of concentration that relates the moles of a substance by the volume in liters.

Formula

Molarity = moles / volume

Substitution

Molarity = 0.285 / 1.2

Simplification and result

Molarity = 0.238

7 0
2 years ago
When doing a recrystallization what observations would prompt you to perform a hot filtration?
KATRIN_1 [288]
Answer is: <span>because dissolved compounds can crystallizing from solution during filtration and forming crystals on the filter paper or funnel.
</span>Recrystallization<span> is a technique used to purify chemicals by dissolving both impurities and a compound in an appropriate solvent, either compound or impurities can be removed from the solution, leaving the other behind.</span>
3 0
3 years ago
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