Calculate the mass of 3.20 mol of sodium hydroxide, NaOH.
M(NaOH) = 40.0g mol-1
Would the following be the correct workings?
n= 3.20 mol M=40.0g mol-1
m(NaOH) = n x M
= 3.20 mol x 40.0g mol-1
= 128 g NaOH
Is this the correct workings?
Yes, your workings are correct! To calculate the mass of sodium hydroxide (NaOH), you can use the formula:
m(NaOH) = n x M
where:
m(NaOH) is the mass of NaOH
n is the number of moles of NaOH (given as 3.20 mol)
M is the molar mass of NaOH (given as 40.0 g/mol)
By substituting the values into the formula, you correctly calculated the mass:
m(NaOH) = 3.20 mol x 40.0 g/mol = 128 g NaOH
Therefore, the mass of 3.20 mol of sodium hydroxide is indeed 128 g. Well done!