When Mercury(II) Oxide, a Red Crystalline Solid, Is Heated, It $\rightarrow$

Multiple Choice

When mercury(II) oxide, a red crystalline solid, is heated, it decomposes to form liquid mercury and oxygen gas, according to the following equation: ___HgO(s) $\rightarrow$ ___Hg(l) + ___O₂(g) (unbalanced) Balance the equation and determine the mass of mercury that should be formed when 12.3 g of HgO is heated.

A) 22.8 g
B) 11.4 g
C) 5.70 g
D) 13.3 g
E) 6.64 g