Which of the following is not required in a chemical reaction?a.
atomic nuclei
c.
products
b.
reactants
d.
energy

Answer:

the same number of electrons in their outermost shells

Explanation:

On the periodic table, elements in the same column have the same number of electrons in their outermost shells (also known as valence electrons), and hence, are said to belong to the same group.

Similarly, elements on the same row in the periodic table have the same number of atomic orbitals and are said to belong to the same period.

The elements in each column have the same number of electrons in their outermost shells.

What is an element of a periodic table?

Elements are defined as the substances in chemistry that can not be broken down by any further chemical reaction.

Typical examples of elements include: oxygen, hydrogen,Helium, calcium, potassium, iron, Chlorine.

These elements are arranged in columns and the rows of the periodic table according to their atomic numbers.

The elements in each column have the same number of electrons in their outermost shells.

Learn more about atoms here:

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Answer: is considered as the limiting reagent for this reaction.

Explanation:

Limiting reagent is the reagent which limits the formation of the product.

Excess reagent is the reagent which is present in excess in a chemical reaction.

For the combustion of acetylene, the reaction follows:

By Stoichiometry,

5 moles of oxygen gas reacts with 2 moles of acetylene.

So, 81 moles of oxygen gas will react with = = 32.4 moles of acetylene.

As, the required amount of acetylene is less than the given amount. So, it is considered as an excess reagent and oxygen gas is the limiting reagent.

Answer:

Oxygen is the limiting reactant of this reaction.

Explanation:

2 moles of acetylene reacts with 5 moles of oxygen.

Then 37 moles of acetylene will react with :

of oxygen gas.

But only 81 moles of oxygen gas is present.

Then 81.0 moles of oxygen gas will react with:

of acetylene.

And still acetylene will remain after.

So, from the above calculation we cans see that oxygen is present in limiting amount which will limit the reaction.Hence, the limiting reactant of this reaction is oxygen.

For this case, the first thing we are going to do is convert all the numbers to the same unit.

For this, we use the following conversion:

1 Kg = 1000 g

We then have the following numbers:

1) 0.00001101 kg = (0.00001101) * (1000) = 0.01101 g

2) 0.001011 g

3) 0.000001101 kg = (0.000001101) * (1000) = 0.001101 g

3) 0.0001011 g

Therefore, the largest amount in grams is:

0.01101 g

Answer:

0.00001101 kg = 0.01101 g

option 1