Question

1. what is the first step in a stoichiometry problem? 27) how many moles of oxygen gas are produced from the decomposition of six moles of 2kclo₃ --> 2kcl + 3o₂ a) 3 mol b) 6 mol c) 9 mol

Explanation:

26)

In stoichiometry, the first step is always to balance the chemical equation. This ensures the law of conservation of mass is obeyed and provides the correct mole - ratios for calculations.

Step1: Identify the mole - ratio

From the balanced equation \(2KClO_3
ightarrow2KCl + 3O_2\), the mole - ratio of \(KClO_3\) to \(O_2\) is \(2:3\).

Step2: Set up the proportion

Let \(x\) be the moles of \(O_2\) produced. We know we have 6 moles of \(KClO_3\). The proportion is \(\frac{2}{3}=\frac{6}{x}\).

Step3: Solve for \(x\)

Cross - multiply: \(2x = 3\times6\), so \(2x=18\), and \(x = 9\) moles.

Answer:

Balance the chemical equation

27)