In the reaction 2kclo3(s) --> 2kcl(s) + 3o2(g) how many liters of oxygen gas at stp are produced from 31.9 g of kclo3?

Answers: -

8.75 L of O₂

Explanation: -

Molar mass of KClO₃ = 39 x 1 + 35.5 x 1 + 16 x 3 = 122.5 g

The balanced chemical equation for this process is

2KClO₃(s) --> 2KCl (s) + 3O₂(g)

From the balanced chemical equation we see

2 mol of KClO₃ gives 3 mol of O₂

At STP,

2 x 122.5 g of KClO₃ gives 3 x 22.4 L of O₂

31.9 g of KClO₃ gives 3 x 22.4 L of O₂ x

= 8.75 L of O₂

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).