Galileo used his telescope to discover evidence for the sun-centered model of the solar system. this evidence included all of the following except
a.
venus going through phases
b.
venus revolving around the sun, not earth
c.
the planets moving in ovals or elipses
d.
moons revolving around jupiter

select the best answer from the choices provided

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?