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2 years ago

What is chemical reaction ??

Chemistry

2 answers:

vitfil [10]2 years ago

7 0

Answer:

A chemical reaction involves, breaking and making of bonds between reactants to give rise to formation of new products. A chemical reaction is basically rearrangement of atoms.

sweet [91]2 years ago

6 0

By definition, chemical reactions are those that cause the chemical bonds between atoms to break and reorganize, giving rise to different substances.

<h3>Substances present in a chemical reaction</h3>

In a chemical reaction there are the substances that react, that is, the reactants, and the substances produced, called products.

<h3>Mass of a chemical reaction</h3>

The mass of the participating substances is the same before and after the reaction, that is, it is conserved. This happens because only a rearrangement takes place between the atoms of the reactants, which break and form new bonds.

<h3>Energy necessary of a chemical reaction</h3>

It must be taken into account that for a chemical reaction to occur the reactants must collide since energy is necessary to break the chemical bonds between atoms.

<h3>Summary</h3>

In summary, chemical reaction is the way one substance reacts against another. In this way, the chemical bonds between atoms are broken and new bonds are formed.

Learn more about chemical reaction:

<u>brainly.com/question/3461108?referrer=searchResults</u>

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If the number of protons had changed then it would just be a different element.

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Calcium has an atomic number of 20. How many electrons of a calcium atom are involved in chemical bonding?

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The answer is 2 electrons.

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3 years ago

How many moles of KBr are present in 500 ml of a 0.8 M KBr solution?

faltersainse [42]

Answer:

2) 0.4 mol

Explanation:

Step 1: Given data

Volume of the solution (V): 500 mL

Molar concentration of the solution (M): 0.8 M = 0.8 mol/L

Step 2: Convert "V" to L

We will use the conversion factor 1 L = 1000 mL.

500 mL × 1 L/1000 mL = 0.500 L

Step 3: Calculate the moles of KBr (solute)

The molarity is the quotient between the moles of solute (n) and the liters of solution.

M = n/V

n = M × V

n = 0.8 mol/L × 0.500 L = 0.4 mol

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3 years ago

Which is best represented by the equation?

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3 years ago

What is chemical reaction ??​

What is chemical reaction ??