A bottle of rubbing alcohol (C3H7OH) from the store is a 70% solution by mass. Determine the total vapor pressure inside the closed bottle. The vapor pressure of the water at room temperature is 24mmHg; the vapor pressure of the volatile rubbing alcohol is 44mmHg.

70% alcohol by mass means 70 g alcohol + 30 g water.

Convert 70 g alcohol to mols.
Convert 30 g water to mols.
Determine mole fraction of alcohol.
Determine mole fraction water.
Palcohol=Xalcohol*Poalcohol.
PH2O</sub=XH2OPowater.
Total pressure is sum of partial pressures. Post your work if you get stuck. Check my thinking. I have some superscripts and subscripts involved here; if they don't turn out properly I will post a correction.

PH2O</sub=XH2OPowater.

shoud be on the front part,
PH2O= etc.

To determine the total vapor pressure inside the closed bottle, we need to consider the individual vapor pressures of water and rubbing alcohol, as well as the concentration of rubbing alcohol in the solution.

First, let's calculate the partial vapor pressure of water in the solution. Since the rubbing alcohol is a 70% solution, we can assume that the other 30% is water.

The partial vapor pressure of water is equal to the total vapor pressure of water (24 mmHg) multiplied by the mole fraction of water. The mole fraction can be calculated by dividing the number of moles of water by the total number of moles in the solution.

Since the rubbing alcohol is a volatile compound, its vapor pressure will contribute directly to the total vapor pressure inside the bottle. However, the concentration of the rubbing alcohol is not given in the question, so we cannot directly calculate its partial vapor pressure. Therefore, we need more information about the concentration of rubbing alcohol in the solution.

Once we have the concentration of rubbing alcohol (expressed as a mole fraction or a percentage), we can calculate its partial vapor pressure by multiplying the total vapor pressure of rubbing alcohol (44 mmHg) by its mole fraction or percentage.

Finally, to get the total vapor pressure inside the bottle, we add the partial vapor pressures of water and rubbing alcohol together.

Therefore, with the information provided so far, we can determine the partial vapor pressure of water but not the total vapor pressure inside the closed bottle.