Heat capacity of ice
How much heat (in ) is required to warm 10.0 of ice, initially at -11.0, to steam at 111.0? The heat capacity of ice is 2.09 and that of steam is 2.01 .
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The Henry's law constant for helium gas in water at 30°C is 3.7 10-4 M/atm; that for N2 at 30°C is 6.0 10-4 M/atm. If the two gases are each present at 1.2 atm pressure, calculate the solubility of each gas.
A solution of 0.90 g of an unknown nonelectrolyte in 300 mL ofwater at 27?C has an osmotic pressure of 38.4 torr. What is the molecular weight of this compound? (Neglect volumechange due to solute, R = 0.0821 L·atm/mol·K)
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
For the reaction CH4+202 yields co2+2H2o, how many moles of carbon dioxide are produced from the combustion of 100 grams of methane?
An empty Erlenmeyer flask weighs 194.4 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 489.1 g. What is the flask's volume?
If a chemical cold pack weighing 28grams and at a temperature of -2C was left in a 25C room for 3 days, what would be the final temperature of the pack?
At 50 degree's Celsius the vapor pressure for methanol and ethanol are 406 and 222 torr, respectively. Given a mixture at 50 degree's Celsius that contains 0.2 mol of methanol and 0.1 mol of ethanol, compute the partial pressures of each liquid an
When mixed together as descripbed in the procedure, the intensity of the FeSCN 2+ absorbance will be less than half the original intensity. Explain why.
Describe (that means you have to write in detail) how to prepare an aqueous 5.0 F solution of acetic acid, CH3COOH. You can start with crystals of the acid and deionised distilled water. Please describe also the apparatus being used
If the height of the mercury column in the leveling bulb is 30 mm greater than that in the gas buret and atmospheric pressure is 670 mm, what is the pressure on the gas trapped in the buret?
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