A 15.0 L cylinder was filled with of O₂ gas at STP. Calculate the number of O₂ molecules in the cylinder.

Question

Quizplus · Accepted Answer

At STP (standard temperature and pressure), 1 mole of any gas occupies 22.4 L. Therefore, a 15.0 L cylinder would contain $ \frac{15.0}{22.4} $ moles of gas. Using Avogadro's number (6.022 x $10^{23}$ molecules/mole), the number of molecules can be calculated as $ \frac{15.0}{22.4} \times 6.022 x 10^{23} $, which equals approximately 4.03 x $10^{23}$ molecules.

A 150 L Cylinder Was Filled with of O2 Gas at at STP

A 150 L Cylinder Was Filled with of O₂ Gas at at STP