Final answer:The volume of the balloon after adding 0.50 moles of gas, while keeping temperature and pressure constant, would be approximately 1.8 liters according to Avogadro's law.Explanation:To determine the volume of the balloon after the addition of 0.50 moles of gas, we would use Avogadro's law which states that the volume of a gas is directly proportional to the number of moles of the gas, given that temperature and pressure remain constant. Originally, the balloon has a volume of 1.50 liters and contains 2.50 moles of gas. If we then add 0.50 moles of gas, we effectively have 3.00 moles of gas.Using the proportionality established by Avogadro's law, we can calculate the new volume using the relationship: (1.50 liters/2.50 moles) = (V2/3.00 moles). Where V2 is the new volume. Solving this equation gives us a new volume of approximately 1.8 liters.Learn more about Avogadro's Law here:brainly.com/question/4133756#SPJ12...

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