How many molecules of N₂ are in a 250.0 mL container at 780 mm Hg and 135°C? A)4.38 × 10²¹molecules B)4.62 × 10²¹molecules C)1.32 × 10²²molecules D)1.39 × 10²²molecules

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Quizplus · Accepted Answer

To find the number of molecules, we can use the ideal gas law equation in the form of PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin. First, we need to convert the given values to the appropriate units: pressure from mm Hg to atm (780 mm Hg / 760 mm Hg per atm), volume from mL to L (250.0 mL / 1000 mL per L), and temperature from °C to K (135°C + 273.15). Then, solve for n (moles) and convert moles to molecules using Avogadro's number (6.022 × 10^23 molecules/mol). The calculation will show that option B gives the correct number of molecules, considering the ideal gas law and the conversion factors.

How Many Molecules of N2 Are in a 250

How Many Molecules of N₂ Are in a 250