The following pictures represent the initial and equilibrium states for the exot

Question

The following pictures represent the initial and equilibrium states for the exothermic decomposition of gaseous A molecules (red) to give gaseous B molecules (blue):

Part A

Write a balanced chemical equation for the reaction.

Express your answer as a chemical equation.

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Part B

Will the number of A molecules in the equilibrium mixture increase, decrease, or remain the same after each of the following changes?

Drag the appropriate items to their respective bins.

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Explanation / Answer

A)

Balanced reaction is given by:

moles initially:

6 mol of RED

2 mol of Blue

in equilbirium

4 mol of RED

6 mol of Blue

note that

moles of RED reacted = 6-4 = 2 mol

moles of BLUE formed = 6-2 = 4

then, ratio is:

2 mol of RED = 4 mol of BLUE, or 1:2

A <=> 2B

must be the reaction

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