Question

What volume does 4.05 mol `C_6H_12O_6` occupy at STP?

Answer 1

I doubt that a compound with formula `C_6H_12O_6` is gas as STP. It should be a solid or a liquid.

Its molecular mass is 180.15 g/mol. If we considere it is glucose the density will be `0.909 g/(cm^3)`

So the volume will be `4.05xx180.15/0.909=803 cm^3`.