Calculate what is the molar mass of the solute
Pure benzene has a normal freezing point of 5.5°C. a solution containing 11.4g of a molecular substance dissolved in 150.0g of benzene (Kf=5.12°C/m) has a freezing point of 1.20°C. what is the molar mass of the solute?
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Assume your are given a brain which weighs 1.45 kg andcontains 7.70e10 cells. If each cell was a cube, and had a densityof 1.0 g/mL
How does the excess CO2 gas in the atmosphere cause the greenhouse effect? What are the potential long-term consequences of greenhouse effect?
A reaction has a standard free-energy change of -13.90 kJ mol-1 (-3.322 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 °C.
The change ininternal energy for the combustion of 1.0 mol of octane at apressure of 1.0 atm is 5084.3 kJ. If the change in enthalpy is5074.3 kJ, how much work is done during the combustion?
Compound A has a solubility of 18 grams per 100. grams of water at25 degrees C. Cooling a saturated, 200.-gram solution of compound Afrom 84 degrees C to 25 degrees C results in a precipitation of 11grams of the compound.
A 0.90 g sample of liquid water was introduced into an evacuated2.00 L flask, which was then sealed and heated to 37'C. What percentage, by mass, of the water remained as liquid? (Vaporpressure of water at 37'C=48.2 torr)
Question: Amount of heat energy required to convert 1 kg of ice at minus 10 degree celius to water at 100 deg cel is 777000 joule. Calculate the specific latent heat.
The density of aluminum is 2.702g/cm3. What is the final liquid level of water if 32.04g of aluminum is dropped into a graduated cylinder containing 15.90mL of water?
A gas cylinder holds 0.330mol of O2 at 150C and a pressure of 3.30atm. The gas expands adiabatically until the volume is doubled. What is the final pressure? What is the final temperature?
Grams and centimeters in the metric system have been defined so that the density of water at 3.98 C is exactly 1. At 20 C, the density of water is 0.9982 g/ml.
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