Final answer:
Dalton's Law states that the total pressure of a gas mixture is the sum of the partial pressures. To find hydrogen's partial pressure, one must subtract the other gases' pressures from the total. However, there is insufficient data in the provided context to calculate the partial pressure of hydrogen.
Step-by-step explanation:
To determine the partial pressure of hydrogen using Dalton's Law of Partial Pressure, we need to understand that the total pressure exerted by a mixture of non-reactive gases is equal to the sum of the partial pressures of each individual gas.
Given the information about the total atmospheric pressure and assuming that the contents of the balloon are only hydrogen and helium, if helium has a known pressure, the pressure of hydrogen can be found by subtracting the pressure of helium from the total pressure.
In the examples provided, Dalton's law is demonstrated, and the partial pressures of different gases are simply summed to arrive at the total pressure. However, in the case of the problematic question, specific pressures for helium or other gases are not provided, so it would be impossible to calculate the partial pressure of hydrogen without that data.
Since the necessary information to calculate the partial pressure of hydrogen isn't given in the provided context, we cannot answer this question definitively. The question seems to be incomplete as it does not provide the partial pressure of helium or any other gases present in the balloon besides hydrogen.