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Gwar [14]
3 years ago
10

Which of the following is an example of a chemical change?

Chemistry
2 answers:
lozanna [386]3 years ago
6 0
What examples? Your question is not complete please provide more information in order to answer.
Nutka1998 [239]3 years ago
4 0
What are your examples to work off?

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Which example is a body fossil?
marin [14]
Answer:
B
Explanation:
An body fossil is something that is apart of the animals b o d y that was left behind to be fossilized.
3 0
3 years ago
A primary amine contains a five-membered carbon ring. The degree of unsaturation for the five-membered carbon ring is equal to t
IceJOKER [234]

Answer:

C₇H₁₁N

Explanation:

To find the chemical formula, first, let's evaluate the given conditions.

1. <u>Is a primary amine</u>:

This means that the amine is connected to a carbon, like NH₂-R

2. <u>The degree of unsaturation of the five-membered carbon ring is equal to three</u>:

One of the degrees of unsaturation is for the five-membered carbon ring, the other two are for pi-bonds. This means that the five-membered carbon ring has 2 pi-bonds inside.

3. <u>There are seven carbon atoms</u>:

Five of these seven carbons are for the carbon ring and the other two are bonded to the primary amine.

From all of the above, we have that the chemical formula is:

C₅H₅-C₂H₄-NH₂ = C₇H₁₁N  

I hope it helps you!

7 0
3 years ago
Sodium thiosulfate, Na 2S 2O 3, is used as a "fixer" in black and white photography. Identify the reducing agent in the reaction
Tatiana [17]

Answer: Reducing agent in the given reaction is S_{2}O^{2-}_{3}.

Explanation:

A reducing agent is defined as an element which tends to lose electrons to other element leading to an increase in its oxidation number.

In the given reaction, oxidation state of sulfur in S_{2}O^{2-}_{3} is +2 and I_{2}(aq) has 0 oxidation state.

In S_{4}O^{2-}_{6}(aq) oxidation state of S is 2.5 and in 2I^{-}(aq) oxidation state of I is -1.

Since, an increase in oxidation state of S is occurring from +2 to +2.5. Hence, it is acting as a reducing agent.

Thus, we can conclude that reducing agent in the given reaction is S_{2}O^{2-}_{3}.

8 0
3 years ago
NaOH(aq) + MgSO4(aq) →
Cerrena [4.2K]

Answer:

if balanced reaction then 2 NaOH + MgSO4 → Mg(OH)2 + Na2SO4

Explanation:

3 0
3 years ago
Formula<br>gravity<br>of acon due to​
artcher [175]

Answer:

hey mate

Explanation:

Formula for Acceleration Due to Gravity

These two laws lead to the most useful form of the formula for calculating acceleration due to gravity: g = G*M/R^2, where g is the acceleration due to gravity, G is the universal gravitational constant, M is mass, and R is distance.

4 0
3 years ago
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