1pt Which statement describes what happens during a decomposition reaction? O A. an atom or ion in a compound is replaced by another atom or ion
O B. cations and anions in two compounds trade places
O C. two or more reactants form a single product
O D. a compound breaks down into separate elements and compounds

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

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?

Is the flow of energy during vaporizing more like the flow during melting or during freezing