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what is the total number of liters of O2 at STP needed to produce 6.0 times 10^23 molecules of H2O.
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
What is the PH of .0750L of hypochlorous acid/hypochlorite buffer solution, originally .300M in HCLO and .400M in CLO-. after 7.5E-3 moles of NAOH have been added to the buffer
A 1.90 g sample of a large boimolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule
One liter of a buffer solution is prepared by dissolving 0.115 mol of NaNO2 and 0.070 mol of HCl in water. What is the pH of this solution? If the solution is diluted two fold with water, what is the pH?
Calculate the change in entropy when one mole of ice at ?10.0°C and 1 atm is converted to liquid water at ?5.0°C and 1 atm. The molar enthalpy of fusion for H2O
The final temperature of the water and metal was 25.0 C. Assuming no heat is lost to the surroundings,calculate the specific heat of the metal and estimate its atomic weight
If the pressure of CO2 is 0.550 atm, what concentration of carbon dioxide can be dissolved in water at 0.00C.
The balloon rises to an altitude of 20,000 m, where atmospheric pressure is 55 mmHg and the temperature is 210 K. What is the volume of the balloon at 20,000m?
The half-life for the radioactive decay of [U]-238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 20% of the [U]-238 atoms in a sample of [U]-238 to decay?
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0L and which contains O2 gas at a pressure of 16,500kPa at 23°C.
Trees in cold climates may be subjected to temperatures as low as -60 C. Estimate the concentration of an aqueous solution in the body of the tree that would remain
Quinine (C20H24N2O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug.
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