A balloon contains 3.4 He. The pressure is reduced to 176.1 kPa and the balloon expands to occupy a volume of 14.2 L. What was the initial pressure exerted on the balloon?

What record? the question is incomplete

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In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.