Which of the following would cause a decrease in the volume of a sealed balloon filled with helium? adding oxygen gas decreasing temperature adding more helium decreasing pressure

## Step 1The volume of a gas is determined by the ideal gas law, which states that the volume of a gas is directly proportional to the temperature and inversely proportional to the pressure, assuming the amount of gas and the gas constant are constant. This is represented by the formula:### where is the volume, is the number of moles of gas, is the gas constant, is the temperature, and is the pressure.## Step 2Adding oxygen gas to the balloon would not decrease the volume of the balloon. This is because the volume of a gas is not affected by the type of gas, but rather by the temperature and pressure.## Step 3Adding more helium to the balloon would not decrease the volume of the balloon. This is because the volume of a gas is not affected by the amount of gas, but rather by the temperature and pressure.## Step 4Decreasing the temperature of the balloon would decrease the volume of the balloon. This is because the volume of a gas is directly proportional to the temperature. When the temperature decreases, the volume of the gas also decreases.## Step 5Decreasing the pressure of the balloon would increase the volume of the balloon. This is because the volume of a gas is inversely proportional to the pressure. When the pressure decreases, the volume of the gas increases.