Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen:
4KNO₃(s) → 2K₂O(s) + 2N₂(g) + 5O₂(g)
To produce 56.6 kg of oxygen, how many
(b) grams of KNO₃ must be heated?

Respuesta :

If you are looking for the mass of KNO3 needed then Mass (g) = Mole (mol) × Molar Mass (g/mol),

1415 ×101 = 142,915g

= 142.915kg

This is a stoichiometric kind of question where everything should be converted into moles in order to proceed on with the calculations.

First you find the number of moles of oxygen using the following formula:

Mole (mol) = Mass (g) / Molar Mass (g/mol)

For oxygen, the molar mass is 32g/mol.

Therefore the number of moles in 56.6kg of oxygen is....

(56.6 ×1000)/32 = 1768.75

From the reaction equation, the ratio of KNO3 to O2 is 4:5.

Thus the number of moles of KNO3 is 1768.75 ×4/5

= 1415 mol.

If you are looking for the mass of KNO3 needed then Mass (g)

= Mole (mol) * Molar Mass (g/mol),

= 1415 ×101 = 142,915g

= 142.915kg

What happens to potassium nitrate when heated?

When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.

What is meant by chemical reaction explain with an example?

A chemical reaction is the process in which new substances with new properties are formed. For example: When magnesium ribbon is heated, it burns in air to form a white powder called magnesium oxide. 2Mg (s) + O2(g) → 2MgO (s)

Learn more about chemical reaction :

brainly.com/question/16416932

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