$($I$)8,22,34,16,24$ bottom$)$ for the number neutrons in column $6$ is

$($III$)24,8,34,16,22$

$($II$)8,22,16,24,34$

$($IV$)8,24,34,16,22$

$($A$)$ I

$($B$)$ II

$($C$)$ III

$($D$)$ IV

$49.$ What is the molarity $($M$)$ of a $KCl$ solution prepared by diluting $75\mathrm{.}0mL$ of a $0\mathrm{.}200M$ solution to a final of $100.mL?$

$($A$)0\mathrm{.}267MI$

$($B$)0\mathrm{.}150M$

$($C$)0\mathrm{.}200M$

$($D$)0\mathrm{.}100M$

$50$ Which equation$($s$)$ in the following list represent$($s$)$ a single replacement reaction?

$($I$)N{a}_{2}C{O}_3($aq$)+BaC{l}_2($aq$)dotsBaC{O}_3(s)+2$NaCl $($aq$)$

$($II$)MgC{O}_3($s$)-...-$ MgO $($s$)+C{O}_2($g$)$

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

$($IV$)2Mg(s)+O_2($g$)-....-2$MgO $($s$)$

$($A$)$ I

$($B$)$ II

$($C$)$ III

$($D$)$ IV