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2 years ago

Which example is an exothermic reaction?

Chemistry

2 answers:

Ulleksa [173]2 years ago

7 0

Answer: it is C condensation

Explanation: I took the quiz

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ratelena [41]2 years ago

5 0

Answer:

C. Condensation

Explanation:

When molecules release heat energy, it is called exothermic. In this case, condensation would be an example of this.

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3 years ago

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Is hydrogen a metal?

Ilia_Sergeevich [38]

No, Hydrogen is a gas.

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4 years ago

a chemical company claims that they are able to produce a certain product thermodynamically unfavored process. Explain how this

KonstantinChe [14]

Thermodynamically favored process are those processes that do not require any assistance from outside the system e.g water boils at 25 degrees. Thermodynamically unfavored processes require assistance from outside to induce the required change for example water doesn't freeze at 15 degrees and therefore for that to happen several factors in the system have to be modified to achieve this. Therefore, there is a possibility of companies to produce product by using thermodynamically unfavored process by inducing changes in the system to achieve desired change or modification.

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3 years ago

As a "rule of thumb" there are 20 drops of a liquid in a mL. Using this estimate and a density of 1.685, how many moles are in 2

arlik [135]

Answer:

0.020 mol

Explanation:

Let's consider the following relations:

20 drops of a liquid have a volume of 1 mL.
The density of the solution is 1.685 g/mL, that is, each milliliter of solution has a mass of 1.685 g of solution.
There are 85 g of phosphoric acid per 100 grams of solution (85 % by weight).
The molar mass of phosphoric acid is 97.99 g/mol

With these relations, we can calculate the moles of phosphoric acid in 27 drops of solution.

$27drop \times \frac{1mL}{20drop} \times \frac{1.685gSolution}{1mL} \times \frac{85gH_3PO_4}{100gSolution} \times \frac{1molH_3PO_4}{97.99gH_3PO_4} = 0.020 mol$

4 0

3 years ago

1. Write the electron configuration for Al (aluminum). Then, write the noble gas configuration. Finally, draw

Zanzabum

Answer:

[Ne] 3s² 3p¹

1s2 2s2 2p6 3s2 3p1

Explanation:

3 0

4 years ago