A balloon with volume 750 cm3 is filled with O₂ at 27°C has a mass of 83.3 g. The mass of empty balloon is 82.1 g. Calculate the pressure of O₂.

Question

Quizplus · Accepted Answer

The correct answer is A.The pressure of O2 can be calculated using the ideal gas law:PV = nRTwhere P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.We can rearrange this equation to solve for P:P = nRT/VWe can calculate the number of moles of O2 using the mass of the balloon and the molar mass of O2:n = m/Mwhere m is the mass and M is the molar mass.The molar mass of O2 is 32 g/mol.n = (83.3 g - 82.1 g) / 32 g/mol = 0.00375 molWe can now calculate the pressure of O2:P = nRT/VP = (0.00375 mol)(0.0821 Latm/(molK))(300 K) / (0.75 L)P = 125 kPa

A Balloon with Volume 750 Cm3 Is Filled with O2

A Balloon with Volume 750 Cm3 Is Filled with O₂