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A 643 mL gas sample at STP is compressed to a volume of 187 mL, and the temperature is increased to 33?C. What is the new pressure of the gas in Pa? Answer in units of Pa.
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
Consider a lake containing 39 ppb (parts per billion) of parathion, which has a log Kow = 3.8. If a sample of lake water was mixed with octanol, what is the expected concentration of parathion in the octanol?
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
Identify the steric number, shape, hybridization about the central atom and molecular polarity of sulphuryl chloride, SO2Cl2.
A mass of 57 g of lead fishing weight absorbs heat of 146 Calories. Determine its final temperature If its initial temperature =48 Centigrade,?
A chemist wants to make 5.5L of a 0.280M CaCl2 solution.What mass of CaCl2 (in g ) should the chemist use
Determine the heat of combustion per gram of octane and the heat of combustion per mole of octane?
What is the percent yield if 6.25 g S2Cl2 is isolated from the reaction of 10.0 g S8 and 7.50 g Cl2?
10mL of 0.1M HNO2 (nitrous acid, ka=4.0x10^-4)is titrated with a .01M KOH solution. After 10mL of the KOH solution is added, what will be the pH in the titration flask?
A 0.4780-g sample of impure Ca(OH)2 is dissolved in enough water to make 57.00 mL of solution. 20.00 mL of the resulting solution is then titrated with 0.1140-M HCl.
If the pressure of 50.0 mL of oxygen gas at 100 °C increases from 735 mm Hg to 925 mm Hg, what is the final volume? Assume temperature remains constant.
A balloon was filled to a volume of 2.50 L when the temperature was rm 30.0 C. What would the volume become if the temperature dropped to rm 11.0 0C.
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