In the reaction, al2o3 + 6 hcl → + 2alcl3, what coefficient should be placed in front of h2o to balance the reaction?

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !