Aluminium is extracted from aluminium oxide. (b) 38% of a rock sample is aluminium oxide Calculate the mass of aluminium oxide in 40 kg of the rock sample Mass of aluminium oxide = kg

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

Based on the equation and the information in the table, what is the enthalpy of the reaction?

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.