Question

calculate the mass of 1 mole of benzene

Answer 1

C6H6-12*6+6*1=78 THIS IS THE MASS OF 1 MOLE OF BENZENE

Answer 2

Let first find the molecular mass of benzene (C6H6)

= (12.011×6)u+(1.008×6)u

= 72.066 u + 6.048 u

= 78.114 u

mass in gram is numerically equal to the atomic/molecular/formula mass in unified mass (u)
hence molar mass of benzene is 78.114 g/mol

mass = molar mass × number of the moles

mass = 79.114 g/mol × 1 mol

mass = 78.114 g