What is the mass of 3 moles of #"C"_2"H"_2# ?
Molar mass of
Therefore, mass of 3 moles of
To find out the mass of moles, we have to multiply the number of moles by the molar mass of the substance, i.e. we can form an equation like this:
So, the mass of three moles of acetylene is
Now, we can round off to the nearest whole number to make the answer more reasonable, so it'll be