Hi, I'm agree with the answer of Mr Silva. I can add this precision: this information is good if you have pure glycerol (100%). If the glycerol is not pure, you need to divide the weight by the concentration in %. Ex glycerol at 50%, you need to weight 99,094/0,50= 198,18 g of glycerol (50%) to obtain 1 mole of glycerol.