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A gas sample heated in a cylinder uses 650kJ of heat. A piston that compresses the gas does 800kJ of work. What is the change in internal energy of the gas during this process
Home ice cream makers use ice to cool a concentrated NaCl solution below the normal freezing point of water. What molal concentration of salt is needed to lower the freezing point to -4.49 C?
Identify the oxidizing agent and reducing agent in the reaction. give breif rational for how this answer is arrived
Calculate the amount of energy in kilojoules needed to change 423g of water ice at -10 deg c to steam at 125 deg c . The following constants may be useful:
Calculate the Calorimeter Constant if 25 g of water at 50 C was added to 25 g of water at 25C with a resulting temperature of 35 C?
Propose structures for aromatic hydrocarbons that meet the following descriptions:
A mixture of pentane and hexane has a vapor pressure of 258 torr. The standard vapor pressure of pentane is 425 torr. What is the mole fraction of pentane?
When using dichloromethane as a solvent, which would make a good, yet cost effective, drying agent?
A particular application calls for N2 (g) with a density of 1.80 g/L at 32°C. What must be the pressure of N2 (g) in millimeters in mercury? What is the molar volume under these conditions
What is the energy change when the temperature of 12.3 grams of solid tin is decreased from 38.1 C to 24.7 C
If a protein sample has a molar mass of approximately 14,000 u, what is the expected freezing point depression when 1.00g is dissolved in 50.0mL of distilled water
What is the mass of air in the cylinder? What is the temperature in the cylinder when the volume reaches 4.00 in3?
A fluid has a density of 4.25 g/mL. If you need to acquire 5.0 g of the fluid, how much volume will you need to draw?
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