Cho chất a gồm fe và oxi. Biết oxi chiếm 30%khối lượng. Tìm công thức hoá học của a

How many moles of al3+ ions are in 1.25 moles of al2o3

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.