26) what is the first step in a stoichiometry problem? 27) how many moles of oxygen gas are produced from…

26) 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

26) 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

Answer

26)

Brief Explanations:

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.

Answer:

Balance the chemical equation

27)

Explanation:

Step1: Identify the mole - ratio

From the balanced equation (2KClO_3\rightarrow2KCl + 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:

C. 9 mol