reacted to form \( \mathrm{Mg}(\mathrm{OH})_{2} \cdot 3 \mathrm{MgCO}_{3} \cdot 3 \mathrm{H}_{2} \mathrm{O} \). Determine the theoretical yield of \( \mathrm{Mg}(\mathrm{OH})_{2} \cdot 3 \mathrm{MgCO}_{3} \cdot 3 \mathrm{H}_{2} \mathrm{O} \). If the actual yield of \( \mathrm{Mg}(\mathrm{OH})_{2} \cdot 3 \mathrm{MgCO}_{3} \cdot 3 \mathrm{H}_{2} \mathrm{O} \) was 0.5422 g , determine the percent yield.