SEP Design Your Solution Biosphere 2 was an attempt to have humans live within a perfectly closed system , as a model for living on other planets . The first attempt failed because the system began losing C*O_{2} , which was chemically reacting with the exposed concrete walls . How would you go about designing a habitat that is a closed system ? Explain how matter and energy would flow within the system .

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?