The diagram presents the phases of the moon as viewed from space. The various positions of the moon are numbered. Which position would appear as a waning gibbous when viewed from Earth? Select one: O 2
O 4
O 6
O 8

An experimental procedure requires a 10 ml of acid to be dissolved

The element that has the greatest electronegativity is

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?