Chemistry
This would be an enthalpy of combustion, not formation. The heat of combustion for decane is 6777.45kJ/mol.
Chemistry
Octane has a vapor pressure of 40 torr at 45.1 degrees Celsius and 400 torr at 104 degrees Celsius. What is its heat of vaporization? (Given R=8.314J/mol*K) Please explain.
Chemistry
A solution of potassium hydroxide is in equilibrium with an undissolved solute at 45 degrees Celsius. What will happen to the mass of the potassium hydroxide if the temperature is raised to 50 degrees Celsius? (Given that heat of solution is -57.6kJ/mol)Please explain as well.
Science
i believe number 2 is D. erractics
Social Studies
In the election of 1860 the _____ won the electoral votes of all the free states except a fraction of the new jersey votes.
Math
Anna Age-6 Laura Age-3 Product= 6*3=18 Sum=6+3=9
Math
Anna is 3 years older than Laura. The product of thier ages is double the sum of thier ages. How old are they?
college
You transfer a sample of gas at 17 degrees celsius for a volume of 5.86 L and 1.10 atm to a container at 37 degrees celsius that has a pressure of 1.10 atm. what is the new volume of gas?
Organic Chemistry
I've been told that both scratching the outside and seeding can cause crystallization, but don't take my word. I'm not totally sure.
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