A [x] mL sample of nitrogen gas was collected over water at…

A [x] mL sample of nitrogen gas was collected over water at 23.7°C and a barometric pressure of 706 mmHg. What mass of nitrogen, in grams, was collected? [The vapor pressure of water at 23.7°C is 22 mmHg.]  Enter a number, without units, to 4 decimal places.

Find the  standard enthalpy of the schematic reaction (ΔHorx…

Find the  standard enthalpy of the schematic reaction (ΔHorxn) in kJ/mol, described by the equation: [a]X + [b]Yx  → [c]Z + [d]Yz Standard enthalpies of formation of reactants and products are (in kJ/mol) ΔHfo(X) ΔHfo(Yx) ΔHfo(Z) ΔHfo(Yz) [dha] [dhb] [dhc] [dhd] Enter your answer to 0 decimal places and without units.

When [sltM] g MgCl2 is dissolved in enough water to give [so…

When [sltM] g MgCl2 is dissolved in enough water to give [solutM] g of the solution in a coffee-cup calorimeter, the temperature increases from [Tlow] °C to [Thigh] °C. If the solution has a specific heat capacity which is essentially the same as water, 4.184 J/g∙ °C, calculate the enthalpy change in J per gram of MgCl2 dissolved. Enter your answer to 0 decimal places and without units