General Chemistry Answers

Suggest an explanation for the decreasing solubilities of the sulphates of the Group II elements as the proton (atomic) number of the cation increases. Use a Hess cycle to explain. 

Describe and suggest an explanation for the trend in the thermal decomposition of the nitrates of the Group II elements magnesium to barium, writing equations and using diagrams where appropriate

(a)   Draw a Hess cycle to calculate enthalpy of formation of ClO₂ given:∆H^ѳ_f (AgCl) = -127 kJ/mol

(a)   Draw a Hess cycle to calculate enthalpy of formation of ClO₂ given:

∆H^ѳ_f (AgClO₃) = -25kJ/mol

What are the boiling and melting points of a 0.250 mKBr in a water solution? The K_(b) and K_(f) of water are 0.51\deg (C)/(m) and 1.86\deg (C)/(m), respectively.

How many moles of Allicin are there in 39 g of C6H10S2O?

what is the vapor pressure of water above a solution prepared by dissolving 28.5 g glycerin (C_(3)H_(8)O_(3)) in 0.125 kg water at 243 K. The vapor pressure of pure water at that temperature is 233.70 torr.

A sample of gas with a volume of 1.45 L exerts a pressure of 780 torr. Determine its volume when pressure becomes 740 torr at a constant temperature

What is the coefficient of H 2 O when the following equation is properly

balanced with the smallest set of whole numbers?

___ Al 4 C 3 + ___ H 2 O ___ Al(OH) 3 + ___ CH 4

What mass of z would be required to saturate 550 g of water at 70 of?