How many molecules of N₂ are in a 300.0 mL container at 780 mm Hg and 135°C? A)5.26 × 10^{21 molecules} B)5.54 × 10^{21 molecules} C)1.59 × 10^{22 molecules} D)1.67 × 10^{22 molecules}

Question

Quizplus · Accepted Answer

To find the number of molecules, use the ideal gas law PV = nRT. Convert the pressure to atm (780 mm Hg = 1.026 atm) and the temperature to Kelvin (135°C = 408 K). The volume is 0.300 L. Solve for n (moles of gas) and then multiply by Avogadro's number (6.022 × 10^23 molecules/mol) to find the number of molecules. The calculation gives approximately 5.54 × 10^21 molecules.

How Many Molecules of N2 Are in a 300

How Many Molecules of N₂ Are in a 300