Question

what relates the partial pressure of a gas to the total pressure of a gas mixture?
select the correct answer below:
mole fraction
gas percentage
compression volume
none of the above

Explanation:

According to Dalton's law of partial pressures, the partial pressure \(P_i\) of a gas \(i\) in a gas mixture is related to the total pressure \(P_{total}\) by the formula \(P_i = X_i\times P_{total}\), where \(X_i\) is the mole fraction of gas \(i\). Mole fraction is defined as \(X_i=\frac{n_i}{n_{total}}\) (where \(n_i\) is the number of moles of gas \(i\) and \(n_{total}\) is the total number of moles of all gases in the mixture). Gas percentage is a less - precise and non - standard term in this context compared to mole fraction. Compression volume is related to the physical compression of a gas (e.g., in the context of Boyle's law \(PV = constant\) for a fixed amount of gas at constant temperature) and not directly to the relationship between partial and total pressure in a gas mixture.

Answer:

mole fraction