In the following

$($III$)Zn(s)+2HCl(aq)dotsZnC{l}_2(aq)+H_2(g)$

$($iv$)2Mg(s)+O_2(g)dots2$MgO$(s)$

$($A$)1($B$)11$

$($C$)$ III

$($D$)$ IV

$36.$ The total pressure in a mixture of nitrogen and oxygen was found to be $1\mathrm{.}40$atm, if the partial pressure of nitrogen was $0\mathrm{.}65$atm, what is the partial pressure of oxygen?

$($A$)0\mathrm{.}65$atm

$($B$)0\mathrm{.}75$atm

$($C$)2\mathrm{.}05$atm

$($D$)0\mathrm{.}8$atm

$37.$ Calculate the $\%(\frac{m}{m})$ of platinum in a gold ring that contains $18\mathrm{.}00g$ gold and $5\mathrm{.}5000g$ of platinum.

$($A$)23\mathrm{.}40\%$

$($B$)0\mathrm{.}2340\%$

$($C$)2\mathrm{.}340\%$

$($D$)2340\%$

$38.$ A $300\mathrm{.}0mL$ portion of $H_{2}O$ is added to $300\mathrm{.}0mL$ of $0\mathrm{.}250M{H}_{2}S{O}_4.$ What is the new molarity?

$($A$)0\mathrm{.}125M$

$($B$)0\mathrm{.}250M$

$($C$)0\mathrm{.}500M$

$($D$)0\mathrm{.}250M$

$39.$ How many milliliters of $0\mathrm{.}400$MNaOH are required to completely neutralize $20\mathrm{.}00mL$ of $0\mathrm{.}200MHCl?$

$($A$)50\mathrm{.}0mL$

$($B$)40\mathrm{.}0mL$

$($C$)20\mathrm{.}0mL$

$($D$)10\mathrm{.}0mL$

$40.40.$ Which of the following is a true statement?

$($A$)$ Colligative properties are solution properties that depend on the identity of the solute;

$($B$)$ Colligative properties are solution properties that depend on the concentration of the solute particles;

$($C$)$ Colligative properties are solution properties that depend on both the concentration and the identity of the solute;

$($D$).$ All of the above

$41.$ What is the highest energy level for Selenium?

$($A$)3s^2$

$($B$)4p^5$

$($C$)3p^4$

$($D$)4p^4$