What appears to happen in the sky during one rotation of Earth? Choose the two correct answers. A. The moon appears to hide the sun. B. The sun appears to move past the moon. C. Constellations appear to move from east to west. D. The sun appears to move from east to west. E. The sun appears to move from west to east. F. Constellations appear to move from west to east.

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?