Write the name of the compound ${\mathrm{H}}_2{\mathrm{CO}}_3$.

$$\begin{gathered} \mathrm{A}=\mathrm{M}{\left({\mathrm{SO}}_4\right)}_3 \\ \mathrm{B}={\mathrm{M}}_2{\left({\mathrm{SO}}_4\right)}_2 \\ \mathrm{C}={\mathrm{M}}_2{\left({\mathrm{SO}}_4\right)}_3 \end{gathered}$$

Enter your correct answer as A, B or C.

$$\begin{gathered} \mathrm{A}={\mathrm{M}}_2{\mathrm{S}}_3 \\ \mathrm{B}={\mathrm{M}}_2\mathrm{S} \\ \mathrm{C}={\mathrm{M}}_2{\mathrm{S}}_2. \end{gathered}$$

Enter your correct answer as A, B or C.

Determine the molecular mass of $\mathrm{Al}{\left(\mathrm{OH}\right)}_3$.

Determine the molecular mass of $\mathrm{CuO}$.

$\mathrm{A} : 75 \mathrm{amu}$

$\mathrm{B} : 76.5 \mathrm{amu}$

$\mathrm{C} : 79.5 \mathrm{amu}$

Enter the correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$.