$1$a$)$ In reaction where the molar enthalpy change with respect to bismuth $($V$)$ oxide is $+15\mathrm{.}20$ kJ$/$mol$,$ a student reaction absorbs $145\mathrm{.}0$ kJ$.$ How many moles of bismuth $($V$)$ oxide reacted?

b$)$ Consider the following reaction: In order to produce $299\mathrm{.}25$ kJ of heat energy, how many moles of FeS must react? $4$FeS$($s$)+7$O$2($g$)-->2$Fe$2$O$3($s$)+4$SO$2($g$)+190$kJ

c$)$ In the chemical reaction $2$NH$3($g$)+4$H$2$O$($l$)-->2$NO$2($g$)+7$H$2($g$)$If the rate nitrogen dioxide is measured to be $0\mathrm{.}46$ mol$/$L$$s produced, what would the rate of consumption of water be$?$

d$)$ When solid ammonium chloride, NH$4$Cl$,$ is added to water, the temperature of the solution decreases. Which statement best describes this observation?

a$.$ NH$4$Cl$($s$)+33\mathrm{.}6$ kJ $-->$ NH$4+($aq$)+$ Cl$($aq$)$

b$.$ Heat is released from the system

NH$4$Cl$($s$)$ does not dissolve in water.

The reaction is exothermic

NH$4$Cl$($s$)-->$ NH$4+($aq$)+$ Cl$($aq$)+33\mathrm{.}6$ kJ