Selection of Even–Numbered Problem Solutions

Chapter 8

P–8.2

We determine the amount of gas in mol from the ideal gas law n = p V/(R T). We convert the values given

in the problem to standard units:

the pressure p = 5.0 × 10–6 mmHg = 6.65 × 10–4 Pa,

the volume V = 1.0 × 10–5 m³ and

the temperature T = 293 K. Thus:

(1)

Next, we multiply n with Avogadro’s number, NA, to obtain the number of molecules in the container, N:

(2)