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.

Unbalanced chemical equation of synthesizing cryolite:

Al₂O₃ + NaOH + HF → Na₃AlF₆ + H₂O.

Balanced chemical equation:

Al₂O₃ + 6NaOH + 12HF → 2Na₃AlF₆ + 9H₂O.

According to principle of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.  

There are two aluminium atoms (Al), six sodium atoms (Na), eighteen hydrogen atoms (H), nine oxygen atoms (O) and twelve fluorine atoms (F) on both side of balanced chemical reaction.

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.