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lys-0071 [83]
4 years ago
9

Which of the following describes an exothermic reaction?

Chemistry
1 answer:
sattari [20]4 years ago
7 0

Answer:

The answer to your question is: second option.

Explanation:

An exothermic reaction is a reaction that releases energy to the environment.

Thermal energy is absorbed by the system. This sentence is describing an endothermic reaction.

Thermal energy is absorbed by the surroundings. This sentence is describing an exothermic reaction.

Thermal energy is not transferred.  This sentence is describing an isolated system.

The initial and final temperatures of the system remains the same. This option is incorrect is not describing an exothermic reaction.

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1)
nataly862011 [7]

Answer:

A

Explanation:

a is the right answer abi

5 0
3 years ago
According to Coulomb’s law, what will happen to the electric force between
Deffense [45]

Answer:

C. Fe will stay positive and increase in magnitude.

Explanation:

Coulomb's law states that the force of attraction of repulsion between two charged particles is directly proportional to the magnitude of their charges and inversely proportional to the square of the distance of separation between them.

This means that if the size of the charges are large, the force acting on them will be large as well. Also if the distance between the two charges increases the force decreases. However, the force increases when the distance of separation decreases.

Like charges repel, therefore, two negative charges brought together will repel each other, and the distance between the two charges decreases, the force will increase in magnitude. Forces of repulsion are considered positive, therefore, the force, Fe, will stay positive and increase in magnitude.

8 0
3 years ago
What is the volume of 1.60 grams of O2 gas at STP? (5 points)
tiny-mole [99]

Answer:

  • <u><em>1.12 liters</em></u>

Explanation:

<u>Calculating number of moles</u>

  • Molar mass of O₂ = 32 g
  • n = Given weight / Molar mass
  • n = 1.6/32
  • n = 0.05 moles

<u>At STP</u>

  • One mole of O₂ occupies 22.4 L
  • Therefore, 0.05 moles will occupy :
  • 22.4 L x 0.05 = <u><em>1.12 L</em></u>
5 0
2 years ago
Read 2 more answers
According to the atomists, the entire physical world was made of:
olga2289 [7]
Atoms and void would be the answer
6 0
4 years ago
A reaction that gives off light is known as an _______ reaction?<br>​
sukhopar [10]

Answer:

A .Exothermic

Explanation:

An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction.

4 0
3 years ago
Read 2 more answers
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