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3 years ago

Are limiting reagents present in all reactions? Explain

Chemistry

1 answer:

nexus9112 [7]3 years ago

6 0

Limiting reagents doesn't present in all reactions.

No. not at all

<u>Explanation:</u>

In any chemical reaction, the reactant which is used first is called as limiting reagent. From a mathematical point of view, there always won't be any limiting reagent. But in the molecular perspective, in a reaction, one of the reactant must used up since we can't count the atoms accurately.

Consequently even if there is an ideal stoichiometric ratio by means of moles mathematically, there may not exist a perfect stoichiometric ratio in terms of molecules probably in molecular view point.

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Recycling of aluminum cans is an example of A) increasing entropy is a nonspontaneous process B) decreasing entropy is a nonspon

Helen [10]

Answer:

B) decreasing entropy is a non-spontaneous process

Explanation:

3 0

3 years ago

Which of the following coefficients are needed to balance the combustion reaction of ethanol?

djyliett [7]

Answer is: d. 3,2,3.

Balanced chemical reaction: CH₃CH₂OH + 3O₂ → 2CO₂ + 3H₂O.
CH₃CH₂OH is ethanol.
O₂ is molecule of oxygen.
CO₂ is carbon(IV) oxide.
H₂O is water.
There are same number of atoms (oxygen, carbon and hydrogen) on both side of balanced chemical reaction:
2 atoms of carbon.
6 atoms of hydrogen.
7 atoms of oxygen.

5 0

3 years ago

When the following reaction reached equilibrium at 325 K , the equilibrium constant was found to be 172. When a sample was taken

miss Akunina [59]

Answer: 6.88M

Explanation:

K= [N204]/[NO2]^2

[NO2]= 0.2M

K=172

[N204]=K * [N02]^2

172 *0.2^2

=6.88M

6 0

2 years ago

Give examples which indicate that nylon fibres are very strong.

Readme [11.4K]

Explanation:

is used for making ropes, used for climbing rocks and for making parachutes. Their usage shows that nylon fibres have high tensile strength

3 0

2 years ago

Sheena has a lump of sodium, a lump of potassium and a lump of lithium, but they’ve got mixed up and she doesn’t know which one

Arada [10]

Answer:

Explanation:

Just saw your request regarding answering this so here it is:

All of them belong of Group 1 in periodic table and thus are highly reactive! Pattern of reactivity for Group 1 (Alkali metals) increases as you move down the group as their radius keeps increasing and thus electrons can be easily lost. Thus, to ID the lumps, Sheena should look at their reactivity and she should get the following trend:

Most reactive: Potassium (K)

Intermediate: Sodium (Na)

Least reactive: Lithium (Li)

Hope it helps!

5 0

2 years ago