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If 5.25 mL of .1 M NaOH solution is needed to just neutralize excess acid after 20 mL of HCl was added to 1. g of the antacid, how many moles of acid can the antacid counteract per gram.
The weight of the product (Hexaphenylbenzene) for this part of the reaction was 2.04 g. What is the percentage yield? What is the overall percent recovery for the three step process?
What is the change in internal energy of the system, with the system regarded as the CD player alone? Assume that the battery does 500 kJ of work on the CD player, which then does the same amount of work on the surroundings.
The ballon ascends to and altitude where the pressure is 504 mmHg and temperature is -34degree celcius . What is the volume of the ballon at this altitude
Calculate the vapor pressure lowering of a solution of 2.40 g of aspirin (molecular weight = 180.15 g/mol) in 55.0 g of methanol (CH3OH) at 21.2°C
A cylinder of helium has a volume of 8.00 L. The pressure of the gas is 388 lb in-2 at 25C. What volume will the helium occupy at standard atmospheric pressure (14.7 lb in-2) assuming there is no temperature change?
How many grams of propanol (C3H7OH, 60.10 g/mol) would be needed to make 750 mL of a solution with an osmotic pressure of 25 atm at 25°C? (R = 0.0821 L/atm/K/mol)
suppose 45.0g of water at 85 C is added to 105.0 g of ice at 0 C. The molar heat of fusion of water is 6.01 kJ/mol, and teh specific heat if water is 4.18 J/g C. on this basis of these data (a) what will be the final temperature of the mixture and..
A 70 piece of ice at 0 is added to a sample of water at 6. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample?
For a solution having .0025 equivalents/liter total alkalinity (contributions from HCO3-, CO3-- and OH- (hydroxide)) at [H+] = 4.69E-11, what is the percentage contribution to alkalinity from CO3--?
the final product was dibenzalacetone. Calculate the theoretical yield of this reaction.
Suppose that 25g of gold is initially at 27 degrees Celsius. What's the final temperature of gold upon absorbing 2.35kJ of heat?
The heat of vaporization of 1.0 mole of water at 100°C and 1.0 atm is 40.6 kJ. Calculate the change in entropy for the process H2O(l) → H2O(g). Document your work here.
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