6.02 * 10²⁰molecules of a substance weigh 44mg. what is the molar mass of the substance?

6.02$\times$10²⁰ molecules weighs = 44 mg = 44$\times$10^-3 g
6.022$\times$ 10²³ molecules weigh = $\frac{44\times {10}^{-3}}{6.02\times {10}^{20}}\times 6.022\times {10}^{23 }$ = 44 g
Hence , the molecular mass of the substance is 44 g.