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An aqueous solution of 0.150 g of the enzyme lysozymedissolved in 210 ml of solution has an osmotic pressure of 0.953torr at 25 oC. Calculate the molar mass oflysozyme.
How many PopTarts® are needed to convert 1,000.0 g of water at 20.0 oC to steam at 100.0 oC? One PopTart is equal to 800,000 J of energy
Ethane and bromine react immediately after being irradiated with UV light. When irradiation stopped, the rate of reaction decreases, but the reaction does not stop immediately. Explain.
silver chlorideagcl often used in silver plating contains 75.27 of silver. compute the mass of agcl essential to plate
Calculate the mass of iodine that will react completely with 40.0 g of aluminum (Al) to form aluminum iodid (AH3)
What is the internal energy change for the system if 969 joules of heat flows into the system from the surroundings and 253 joules of work is done by the system on the surroundings
Americium-241 is used in smoke detectors. It has a rate constant for radioactive decay of k = 1.6x10-3yr-1. What is the half-life of this isotope in years? Give your answer to 3 significant figures.
a gas filed ballon having a volume of 2.50l at 1.2 atm and 20 degrees celcius is allowed to rise to the stratosphere
Calcium hydroxide reacts with carbon dioxide to form calcium carbonate. The reaction for this process is: Ca(OH)2(s) + CO2(g) ? CaCO3(s) + H2O(g), ?H = -69.1 kJ What is the enthalpy change if 380 g of calcium carbonate is formed
Consider the following chemical equation. A) Fe2O3(l) + Al(l) --> Fe(l) + Al2O3(s) If 25.0 g of molten iron(III) oxide reacts with 475 g of aluminum, what is the mass of the iron produced
determine the molar mass of chloroform gas if a sample weighing .389 grams is collected in a flask with a volume of
When 10.0 g of NH3 reacts, the actual yield of N2 is 8.50 g. What is the percent yield?
An experiment shows that a 248 ml gas sample has a mass of 0.435 g at a pressure of 747 mm Hg and a temperature of 26 c. What is the molar mass of the gas?
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