Questions: In the next section, you'll be able to select which gas is in the soap bubble, and which gas is in the glass tank: Your job is to predict in advance whether a particular bubble will float in a particular gas. Select a combination, one gas for the bubble, and one for the tank, so that you think the bubble will definitely float.

Solution Steps

To determine whether a soap bubble will float in a particular gas, we need to compare the densities of the gas inside the bubble and the gas in the tank. A bubble will float if the gas inside it is less dense than the gas in the tank.

We need to choose a gas for the bubble and a gas for the tank such that the gas inside the bubble is less dense than the gas in the tank. Common gases and their densities at standard temperature and pressure (STP) are:

• Hydrogen (\(H_2\)): \(0.0899 \, \text{g/L}\)
• Helium (\(He\)): \(0.1786 \, \text{g/L}\)
• Air: \(1.225 \, \text{g/L}\)
• Carbon Dioxide (\(CO_2\)): \(1.977 \, \text{g/L}\)

To ensure the bubble floats, we should select a gas for the bubble that has a lower density than the gas in the tank. For example:

• If the bubble contains Hydrogen (\(0.0899 \, \text{g/L}\)) and the tank contains Air (\(1.225 \, \text{g/L}\)), the bubble will float because Hydrogen is less dense than Air.

Final Answer