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PIT_PIT [208]
3 years ago
8

Which of the following statements regarding isotopes is TRUE?

Chemistry
1 answer:
FromTheMoon [43]3 years ago
3 0

Answer:

e

Explanation:

A. Is wrong

Isotopes do not have same number of neutrons. They only contain the same number of protons and hence same number of electrons.

B is correct

Isotopes are the different atoms of a particular single element which have exactly the same number of protons but varying number of neutrons.

C is correct

The chemical properties are a function of the electrons since they are the ones involved in chemical bonding. Since the number of electrons are the same, it is expected that they have similar chemical properties.

d is correct

It is the weight of the most abundant isotope that clearly determines the weight of the atom. In fact, the weight of the atom is closest in value to the weight of the atom with the highest abundance

e is correct as all the options here are correct

D is wrong, not all options are correct

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___AsCl3+____H2S-->___As2S3+___HCI​
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Answer:

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

Explanation:

When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.

We usually balance O and H atoms last.

AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 1

Cl --- 3

H --- 2

S --- 1

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

2 AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 2

S --- 1

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of As atoms is now balanced.

2 AsCl₃ + 3 H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of S atoms is now equal on both sides.

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

The equation is now balanced.

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