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saveliy_v [14]
3 years ago
10

Fireworks, KNO3 Give only the names of the elements alphabetically, separating them with commas.

Chemistry
2 answers:
Alborosie3 years ago
4 0
Answer : The  question is to write the elements alphabetically and seperating them with commas.

So in this case for your question of Fireworks , KNO_{3},

The answer will be K, N, O.

You have to just differentiate the elements and write them according to the alphabetical order.
Ksenya-84 [330]3 years ago
4 0

<u>Answer:</u> The elements present are potassium, nitrogen and oxygen.

<u>Explanation:</u>

Elements are defined as the substances in which same type of atoms are present. <u>For Example:</u> Sodium, Chlorine etc.

The chemical formula of the compound used in fireworks is KNO_3

The chemical name for the compound is potassium nitrate.

This compound is formed by the combination of three elements. In 1 mole of potassium nitrate, 1 mole of potassium atom, 1 mole of nitrogen atom and 3 moles of oxygen atoms are present.

Hence, the elements present are potassium, nitrogen and oxygen.

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Answer:

Percent yield = 89.1%

Explanation:

Based on the equation:

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<em>1 mole of Cl₂ reacts with 2 moles of KI to produce to moles of KCl</em>

<em />

To solve this quesiton we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of KCl and the mass:

<em>Moles Cl₂:</em>

8x10²⁵ molecules * (1mol / 6.022x10²³ molecules) = 133 moles

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25g * (1mol / 166.0028g) = 0.15 moles

Here, clarely, the KI is the limiting reactant

As 2 moles of KI produce 2 moles of KCl, the moles of KCl produced are 0.15 moles. The theoretical mass is:

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Percent yield is: Actual yield (10.0g) / Theoretical yield (11.2g) * 100

<h3>Percent yield = 89.1%</h3>
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