Salt is often used to melt ice and snow on roads in the winter and the temperature right now is -4.500°C. How much NaCl (complete dissociation) would be necessary to melt 1000 kg of ice by bringing down the freezing temperature to -4.500°C? Solved and Explain briefly.

Hello I am stuck in my laboratory, I already did the whole procedure, I am in the last step (# 9) but I can't understand that I have what data I have to put in the test data (Theoretical solubility of NaCl, Temperature, Source) could you explain that data I must put, here is all my lab Thank you very much.   Test Data:  Mass of empty 250-mL beaker: 100.7 g Mass of 250-mL beaker and saturated NaCl solution :106.4 g Temperature of saturated NaCl solution: 24.1°C Mass of 250-mL beaker and NaCl residue (1st weighing): 102.7 g Mass of 250-mL beaker and NaCl residue (2nd weighing): 102.2 g Mass of 250 mL beaker and NaCl residue (3rd weighing): 101.9 g             (Use the lowest mass for calculations) This part  7.Theoretical solubility of NaCl ????? (a)Temperature ?????? (b)Source ????

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UF6 is a compound used in the process of enriching uranium. Use the attached thermodynamic data to calculate the temperature for the following phase transition shown at 1 atm. UF6(s) → UF6(g) UF6(g) UF6(s) AH,(g), kJ/mol -2148 -2197 AG, (g), kJ/mol -2029 -2008 s'(g), J/K-mol 377 228 Select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a 55.9°C b. 329°C 304°C 57.0'C e 62.3°C