Synthesize TiO2/graphene nanocomposites. Intially TiO2 is synthesize using 10ml of TTIP,30ml of ethanol, 3ml Of HNO3 and 150ml of deionized water. the mole ratio of TiO2 and graphene is 3:1. graphene is added with 4wt%, 8wt%, 12wt%,16wt% and 20wt%. Find the wt% of graphene in grams.