Question

calculate the number of litres of each gas givin the following number of moles at STPhow many litres of gas is in 0.001 mol H2S

Answer 1

STP stands for Standard Temperature and Pressure. Nowadays the STP is temperature of 0°C (273.15K) and pressure of 1 bar.

Assuming the gas behaves as an ideal gas, in these conditions the volume of each mol of gas is approximately 22.7 L.

Using rule of three, we can calculate the volume of 0.001 mol of H₂S:

Volume --- Number of moles

x --- 0.001 mol

22.7L --- 1 mol

`\begin{gathered} (x)/(22.7L)=(0.001)/(1) \\ x=22.7\cdot0.001L \\ x=0.0227L \end{gathered}`

So, the volume is approximately 0.0227 L.