Which statement correctly describes the relationship between air temperature and air pressure? -Warm air rises, creating an area of low pressure.

-Cool air sinks, creating an area of low pressure.

-Warm air sinks, creating an area of low pressure.

-Cool air rises, creating an area of low pressure.

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?

What happens to the concentration of hydronium ions as the ph of a solution increases? a. hydronium ion concentration stays the same b. hydronium ion concentration decreases c. hydronium ion concentration increases

Determine the length of the object shown. 97.8 mm 97.80 mm 97 mm 98 mm