CS2:12+2*32=76g/mol

500/76=6.58mol

6.58*2*64=842.11g

768/842.11*100%=91.20%

so the percent yield is 91.20%.

500/76=6.58mol

6.58*2*64=842.11g

768/842.11*100%=91.20%

so the percent yield is 91.20%.