Physical Chemistry Answers

Heat of formation of C2H4 = 12.5 Kcal
Heat of atomisation of C+ 171 Kcal
Heat of atomisation of H+ 52.1 Kcal
Bond energy of C-H = 99.3 Kcal
What is C=C bond energy?

A scientist wants to measure the density of an unidentified solid block. It is found to have a volume of 112 cm3 and a mass of 95.0 g. What is the density of the object?

The systolic pressure is 0.158 atm and the diastolic pressure is 0.150 atm in the heart. If the volume pumped in one heartbeat is 75cm3 calculate the work done in a heartbeat.

1)Calculate pH of solution containing 0.100 M CH3COOH and 0.050 M CH3COONa.

sugar dissolves less readily in water as compared to nacl . why?

dissolution of nacl in water is a physical change, not a chemical change. why?

what's H% in methanol CH3OH?

DISSOLUTION OF NACL IN WATER IS A PHYSICAL CHANGE NOT A CHEMICAL CHANGE . WHY?

HYDRATION IS ALSO CALLED SOLVATION BUT SOLVATION IS NOT ALWAYS CALLED HYDRATION. WHY?

1.The radius of a platinum atom is 139 pm. How many platinum atoms would have to be laid side by side to span a distance of 3.47 mm?

2.The mass of a single uranium atom is 4.70E-22 grams. How many uranium atoms would there be in 175 milligrams of uranium

3.The volume of a single uranium atom is 1.37E-23 cm3. What is the volume of a uranium atom in microliters