The average speed of HCl molecules can be found using the ratio of the molar masses of helium and HCl. By setting up a proportion, we can calculate that the average speed of HCl is approximately 12775 m/s.
To find the average speed of HCl, we can use the ratio of the molar masses of helium and HCl. The molar mass of helium is approximately 4 g/mol and the molar mass of HCl is approximately 36.5 g/mol.
We know that the average speed of helium is 1400 m/s. Using the ratio of the molar masses, we can set up a proportion:
1400 m/s / 4 g/mol = x m/s / 36.5 g/mol
Cross multiplying, we get:
x = (1400 m/s * 36.5 g/mol) / 4 g/mol
x ≈ 12775 m/s
Therefore, the average speed of HCl is approximately 12775 m/s.