Help me please idk this one

Asa choose the correct set of reaction coefficients to properly balance the following chemical equation according to the law of conservation of mass: __s8 + __o2 ==> __so2 1, 1, 8 1, 8, 1 1, 8, 8 8, 1, 1

Calculate the number of molecules present in 0.750 mol of mgo.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.