Helium and methane, CH4, are both found in natural gas and can be separated by diffusion. What is the ratio of the diffusion rates for the two species? (rate of diffusion for He divided by the rate for CH4)

2 moles of HCl.

Explanation:

Given data:

Mass of NaOH = 80 g

Number of HCl neutralized by NaOH = ?

Solution:

Chemical equation:

NaOH + HCl         NaCl + H₂O

Number of moles of NaOH:

Number of moles = mass/ molar mass

Number of moles = 80 g/ 40 g/mol

Number of moles = 2 mol

Now we will compare the moles of NaOH and HCl,

               NaOH       :         HCl

                   1            :           1

                 2             :            2

Thus, 2 moles of HCl will neutralized by 80 gram of NaOH.