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Tpy6a [65]
3 years ago
10

Which of the following statements holds true for a chemical change? In a chemical change, no new substance is formed. In a chemi

cal change, a substance changes its phase. In a chemical change, the molecular structure of a substance changes. In a chemical change, one substance dissolves into another. NextReset
Chemistry
2 answers:
expeople1 [14]3 years ago
8 0
<span>In a chemical change, the molecular structure of a substance changes. I think this is right. I hope this helps.</span>
PSYCHO15rus [73]3 years ago
6 0

Answer: In a chemical change, the molecular structure of the substance changes.

Explanation:

Chemical change is the change in which chemical composition of the substance changes by rearrangement of atoms. The molecular structure changes due to change in atoms.

Example: H_2+O_2\rightarrow 2H_2O

Physical change is a change in which only the physical properties such as size, shape etc change and there is no rearrangement of atoms.

Example: melting of ice

H_2O(s)\rightarrow H_2O(l)

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2 years ago
Calculate the number of atoms in 112 g of iron.​
mr_godi [17]

Answer:

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The electron dot structure for CI is
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6 0
3 years ago
Read 2 more answers
___AsCl3+____H2S--&gt;___As2S3+___HCI​
Alex17521 [72]

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.

3 0
2 years ago
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