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A 15.8 g sample of a nonelectrolyte was dissolved is 104.0 g of water. The solution's freezing point was -1.9°C. What is the molar mass of the unknown compound?
A 2.41-L container is filled with 189 g argon. If the pressure is 10.0 atm, what is the temperature?
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 92% of the Mg2 be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9* 10-12.]
A mixture of 70 mole% propane and 30 mole% hydrogen is burned with 30% excess air.
You have a balloon that is not permeable to gas molecules. The balloon is spherical and has a circumference of 3.141592654 m when it is filled with a gas at 20 EC and 1.0000 atm pressure.
2 FeS + 3 N2 → 2 FeN + 2 SN2 This reaction has a 65.0% yield. How much N2 is consumed if 13.6 g of FeN are produced?
What is the boiling point of a mixture composed of 85 g HOCH2CH2OH (ethylene glycol) and 125 g H2O? The boiling point elevation constant for H2O is 0.512 °C/m.
If you have 330 ml of water at 25 degrees and add 110 ml of water at 95 degrees, What is the final temperature of the mixture.
What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration of HCl?
if 5.00g helium gas is added to a 1.00-L ballon cantaining 1.00g of helium gas, what is the new volume of the ballon?
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed? C3H8 + 5 O2 → 3 CO2 + 4 H2O
How many grams of formic acid, HCOOH, must be added to 0.210 L of 0.160 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.10? Assume no volume change. Ka of HCOOH = 5.0 10-4.
Sulfur Dioxide reacts with oxygen to produce Sulfur trioxide in the presence of a catalyst. In an experiment carried out at 727 degrees Celsius
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