This polar bear lives where it is very cold. Its skin is black and that helps absorb heat. The polar bear also has thick layers of fat called blubber. What is this blubber used for? A) It helps the polar bear swim in the ocean. B) It insulates and keeps the polar bear warm. C) Females use the fat to feed the baby polar bears. D) Only males have fat and it is used to attract a mate.

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?