MASS

What masss of water in grams, produces 729 J when cooled from 58.0 degrees Celcius to 28.0 degrees Celsius? A. 3.00 B. 0.0412 C. 0.172 D. 24.3 E. 5.81

Volume

A balloon is filled with helium. Its volume is 5.90 L at 26 degrees C. What will be its volume at -78 degrees C assuming no pressure change? A. -17.1 L B. 9.04L C. 6.93L D. 17.7 E. 3.85 L

ENTHALPY

For the following reaction, what is the enthalpy of cyclization per mole of actylene? 3C2H2 (g) --> C6H6 (l) ^H = -630 kJ A. 210 kJ/mol C2H2 B. -630 kJ/mol C2H2 C. 0 kJ/mol C2H2 D. -210 kJ/mol C2H2 E. -1890 kJ/mol C2H2

Temperature

A balloon of helium whose volume is 2.20 L at 25 degrees C is cooled by pouring liquid N2 over it. The final temperature of the balloon is -196 C. What is the final volume, in L? A. 0.57 B. 8.5 C. -17 D. 0.28 E. 2.2

Wavelength

The minimum energy needed to eject an electron from a sodium atom is 4.41 x 10 to the power of -19J. What is the maximum wavelength of light, in nanometers, that will show a photoelectric effect with sodium?