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Taya2010 [7]
3 years ago
6

What occurs in a chemical reaction?

Chemistry
2 answers:
4vir4ik [10]3 years ago
6 0
B - The reactants are the starting substances and the products are the end substances.
Stella [2.4K]3 years ago
4 0

Answer: Option (b) is the correct answer.

Explanation:

A reaction due to which there occurs a change in the chemical composition of a substance is known as a chemical reaction.

This change in chemical composition occurs when bonds between reactants are broken to form products with new bonds.

Thus, we can conclude that in a chemical reaction products are formed from reactants by the breaking and forming of new bonds.

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Its D

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What is a characteristic of a lewis base?
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The IUPAC rules permit the use of common names for a number of familiar phenols and aryl ethers. These common names are listed h
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Explanation:

a. Vanillin(4-hydroxy-3-methoxybenzaldehyde):

In its structure hydroxl group will be present on para position of the benzaldehyde ring and methoxy group on meta position.

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In its structure isopropyl group will be present on ortho position of the phenol ring and methyl group on meta position.

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In its structure isopropyl group will be present opposite to methyl group which is present ortho position in a phenol ring.

d. Eugenol (4-allyl-2-methoxyphenol):.

In its structure allyl group will be present on para position of the phenol ring and methoxy group on ortho position.

e. Gallic acid (3,4,5-trihydroxybenzoic acid):

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6 0
3 years ago
What is the oxidation state for a Mn atom?<br> (1) 0 (2) +7 (3) +3 (4) +4
ss7ja [257]

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Explanation :

Oxidation state or oxidation number : It represent the number of electrons lost or gained by the atoms of an element in a compound.

Oxidation numbers are generally written with sign (+ and -) first and then the magnitude.

When the atoms are present in their elemental state then the oxidation number will be zero.

As per question, 'Mn' atom is a free element that means it is present in their elemental state then the oxidation state will be zero.

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5 0
3 years ago
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