Write the names of the following compounds: $N_2{O}_5,B_{2}B{r}_4,FeC{l}_2,Fe(OH{)}_2,C_2{H}_{5}OH$

A vinegar sample of $19mL$ was diluted with distilled water to a $250-mL$ volume. $25mL$ portion of this solution was directly titrated with standard $0\mathrm{.}02mo\frac{l}{L}$NaOH solution. The consumption was found as $27\mathrm{.}1mL.$ Find the concentration $(mo\frac{l}{L})$ of acetic acid in vinegar sample.

Calculate the free energy change of the following reaction $($a$).$ Is the disorder increasing or decreasing for this reaction $($b$)?$

$2NO(g)+O_2(g)longrightarrow2N{O}_2(g)at25C$

$H^0=-114\mathrm{.}1kJ$

$S^0=-146\mathrm{.}5\frac{J}{K}$