What are the empirical formula and empirical formula mass for each of the following compounds?

Part $1$ of $4$

$C_8{H}_{16}.$ Round your answer to the nearest hundredths place.

Empirical formula:

Empirical formula mass: $\frac{g}{\text{m}\text{o}\text{l}}$

Part $2$ of $4$

$C_5{H}_{15}{O}_5.$ Round your answer to the nearest hundredths place.

Empirical formula: Empirical formula mass: $\frac{g}{\text{m}\text{o}\text{l}}$

Part $3$ of $4$

$N_2{O}_3.$ Round your answer to the nearest hundredths place.

Empirical formula:

Empirical formula mass: $\frac{g}{\text{m}\text{o}\text{l}}$

Part $4$ of $4$

$T{e}_4{I}_{16}.$ Round your answer to the nearest tenths place.

Empirical formula:

Empirical formula mass: $,g$