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Mrrafil [7]
3 years ago
12

How do i know if a reaction is exo/endothermic?? help please.

Chemistry
1 answer:
goblinko [34]3 years ago
3 0

Answer:

Explanation: in exothermic reaction heat is released out

In endothermic reaction heat is absorbed

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The correct question is as follows: 0.500 moles of potassium oxide is dissolved in enough water to make 2.00 L of solution. Calculate the molarity of this solution (plz help!)

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Molarity is the number of moles of a substance divided by volume in liter.

As it is given that there are 0.5 moles of potassium oxide in 2.00 L of water so, the molarity of this solution is calculated as follows.

Molarity = \frac{moles}{volume(in L)}\\= \frac{0.5 moles}{2.00 L}\\= 0.25 M

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