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natali 33 [55]
2 years ago
7

The carbon atoms in graphite and the carbon atoms in diamond have different

Chemistry
1 answer:
kicyunya [14]2 years ago
7 0

Answer:

<u>structural arrangements</u>

_______________________________________

<h2>properties of daimond: </h2><h3>appearance: transparent</h3><h3>hardness: very hard</h3><h3>thermal conductivity :very poor</h3><h3>electric conductivity: poor</h3><h3>density:</h3>

3510 {kgm}^{3}

<h3>uses: jewellery and drilling</h3>

_______________________________________

<h2>properties of graphite:</h2>

<h3>appearance: black shiny</h3><h3>hardness: soft ,slippery to touch</h3><h3>thermal conductivity : moderate</h3><h3>electric conductivity: good</h3><h3>density:</h3>

2250 {kgm}^{3}

<h3>uses:dry cell, electric arc, pencil lead, lubricant</h3>

_______________________________________

<h2>How Diamond and Graphite are chemically identical?</h2>
  • On heating diamond or graphite in the air, they burn completely to form carbon dioxide.
  • - Equal quantities of diamond and graphite when burned, produce exactly the same amount of carbon dioxide.

_______________________________________

<h2>Why the physical properties of diamond and graphite are so different?</h2>

Due to the difference in the arrangement of carbon atoms in diamond and graphite

_______________________________________

<h2><em><u>hope</u></em><em><u> it</u></em><em><u> helps</u></em><em><u> you</u></em><em><u><</u></em><em><u>3</u></em></h2>

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A student placed a small chip of limestone into a hydrochloric acid solution, and carbon dioxide gas was released. The carbon di
Phoenix [80]

Physical and chemical changes are reversible and nonreversible changes. The release of carbon dioxide gas indicates a chemical change.

<h3>What is a chemical change?</h3>

A chemical change is a change in which a new substance is produced when the reactants react in the reaction mixture. The chemical produced cannot be reversed back to the reactants and hence, it is nonreversible.

The release of carbon dioxide is a chemical change as limestone and hydrochloric acid react with each other chemically and as a result, a new substance was formed.

Therefore, the production of carbon dioxide indicates a chemical change.

Learn more about chemical change here:

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5 0
2 years ago
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Answer:

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3 0
3 years ago
Calculate the volume of a gas at a pressure of 150 kpa if its volume at 180 kpa is 1500 L
Anastaziya [24]

Answer: 1800 L

Explanation:

Given that,

Original pressure of gas (P1) = 180 kPa

Original volume of gas (V1) = 1500 L

New pressure of gas (P2) = 150 kPa

New volume of gas (V2) = ?

Since pressure and volume are given while temperature is held constant, apply the formula for Boyle's law

P1V1 = P1V2

180 kPa x 1500 L = 150 kPa x V2

270000 kPa•L = 150 kPa•V2

Divide both sides by 150 kPa

270000 kPa•L/150 kPa = 150 kPa•V2/150 kPa

1800L = V2

Thus, the new volume of the gas is 1800 liters.

8 0
3 years ago
What is not represented by a balanced chemical equation?
KengaRu [80]

Answer:

A balanced chemical equation follows law of conservation of mass. This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This means that total mass on the reactant side is equal to the total mass on the product side.

6 0
3 years ago
Read 2 more answers
Which of the following you is true for a limiting reactant
skad [1K]

Answer:

  • <em><u>C) The limiting reactant has the lowest ratio of moles available / coefficient in the balanced equation.</u></em>

Explanation:

Please, find attached a complete question to determine which of the statements is or are true for a limiting reactant in a chemical equation.

First, remember that the limiting reactant is the substance that is consumed completely while the excess reactant is the substance that does not react completely.

The limiting reactant is found comparing the stoichiometry ratio and the actual ratio between the reactants.

The stoichiometry ratio is found using the coefficientes of the chemical equation.

For illustration, assume the general chemical equation:

         aA+bB\rightarrow cC+dD

The stoichiometric ratio of the reactants is:

          a\text{ }moles\text{ }of\text{ }A/b\text{ }moles\text{ }of\text{ }B

If the ratio of the available moles of substance A to the available moles of  substance B is greater than the stoichiometric ratio, it means that there are more moles of the substance A than what is needed to react with the available moles of substance B, then A will be in excess and B will B the limiting reactant.

If, on the contrary, the ratio of the available moles of substance A to the available moles of  substance B is is less than the stoichiometric ratio, then substance A is less than the necessary to make the all the moles of substance B react, meaning that the substance A will limit the reaction (it will be consumed completely), while the substance B will be in excess.

As for the options:

<em><u>A) The limiting reactant is has the lowest coefficient in a balanced equation.</u></em>

This is false, since it is not the magnitude of the coefficiente what determines the limiting reactant, but the comparison of the ratios.

<u><em>B) The limiting reactant is the reactant for which you have the fewest number of moles.</em></u>

This is false because it is not the number of moles what determines the limiting reactant , but the comparison of the ratios.

<u><em>C) The limiting reactant has the lowest ratio of moles available / coefficient in the balanced equation.</em></u>

This is true as proved below.

The stoichiometric ratio of the reactants is:

          a\text{ }moles\text{ }of\text{ }A/b\text{ }moles\text{ }of\text{ }B

The actual ratio is:

         available\text{ }moles\text{ }of\text{ }A/available\text{ }moles\text{ }of\text{ }B

Assume the first ratio is less than the second (which describes when the substance A is in excess and the limiting reactant is the substance B).

a\text{ }moles\text{ }of\text{ }A/b\text{ }moles\text{ }of\text{ }B

Change the relation to show the ratios of moles available of each substance to the cofficient in the chemical equation:

available\text{ }moles\text{ }of\text{ }B/b\text{ }moles\text{ }of\text{ }B

Then, in the scenary that the limiting reactant is the substance B, the ratio of the left is lower than the ratio of the right, which is the same that limiting reactant has the lowest ratio of moles available / coefficient in the balanced equation.

<em><u>D) The limiting reactant has the lowest ratio of coefficients in the balanced eqution/moles available.</u></em>

<em><u /></em>

This ratio is the inverse of the ratio of the previous statement, thus the relation is inverse, and, since the previous statement was true, this statement is false.

3 0
3 years ago
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