A 115.0-g sample of oxygen was produced by heating 400.0 g of potassium chlorate. 2KClO3 mc019-1.jpg 2KCI + 3O2 What is the percent yield of oxygen in this chemical reaction?

Answers

Answer 1

Answer: The balanced equation that describes the reaction of heatinf potassium chlorate to produce potassium chloride and oxygen is expressed 2KClO3 = 2KCI + 3O2. For a 400 g potassium chloride, using stoichiometry, the mass oxygen produced is 156.67 grams oxygen. The actual product weighed 115.0 grams. Yield is equal to 115/156.67 or 73.74%

Answer 2

Answer:

Answer:

The percent yield of oxygen in this chemical reaction is 73.71 %.

Explanation:

Experimental yield of oxygen gas = 115.0 g

Theoretical yield:

$2KClO_3rightarrow 2KCI + 3O_2$

Mass of potassium chlorate = 400.0 g

Moles of potassium chlorate = $(400 g)/(122.5 g/mol)=3.2653 mol$

According to reaction, 2 moles of potassium chlorate gives 3 moles of oxygen gas.

Then 3.2653 mol of potassium chlorate will give:

$(3)/(2)* 3.2653 mol=4.89795 mol$

Mass of oxygen gas :

$32 g/mol* 4.89795 mol=156.73 g$

Percentage yield:

$\%=\frac{\text{Experimental yield}}{\text{Theoretical yield}}* 100$

$\%=(115.0 g)/(156.73 g)* 100=73.71\%$

The percent yield of oxygen in this chemical reaction is 73.71 %.

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The mass of the products equals the mass of the reactants because energy is not absorbed or given off by the reaction.

The mass of the products is less than the mass of the reactants because energy is given off by the reaction.

The mass of the products equals the mass of the reactants because the same atoms are present throughout the reaction

Answers

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In a pressure cooker, a lid is screwed tightly onto a pot so that the air pressure in the pot is increased. What effect, if any, will this have on the boiling point of water in the pot?The boiling point will be raised.
The boiling point will be lowered.
The boiling point will be unaffected.
None of the above.

Answers

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Answer: The boiling point will be raised.

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What is a chemical entity that forms a complex ion around a central atom?

Answers

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Answers

Answer:

A chemical reaction is a process in which one or more substances (reactants) are transformed into one or more different substances (products). During a chemical reaction, chemical bonds between atoms in the reactants are broken, and new bonds are formed to create the products. This transformation often involves the rearrangement of atoms and the exchange of energy.

Key characteristics of a chemical reaction include:

1. **Reactants:** These are the substances that undergo the chemical transformation. They are present before the reaction begins.

2. **Products:** These are the substances that result from the chemical reaction. They are formed as a result of the rearrangement of atoms from the reactants.

3. **Chemical Equations:** Chemical reactions are typically represented using chemical equations, which show the reactants on the left side and the products on the right side. For example, the reaction between hydrogen and oxygen to form water is represented as: 2H2 + O2 → 2H2O.

4. **Conservation of Mass:** In a closed system, the total mass of the reactants is equal to the total mass of the products, according to the law of conservation of mass.

5. **Energy Changes:** Chemical reactions may release or absorb energy. Reactions that release energy are exothermic, while those that absorb energy are endothermic.

Chemical reactions are fundamental to chemistry and play a crucial role in various natural and industrial processes. They are involved in everything from the digestion of food in our bodies to the combustion of fuel in engines, and they underlie the synthesis of a wide range of substances, from pharmaceuticals to materials used in everyday life. Understanding and controlling chemical reactions is essential in fields such as chemistry, biology, and engineering.

Answer:

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Answers

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Answer:

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Answers

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Explanation :

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