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A compound with the empirical formula CH2O was found to have a molar mass between 89 and 91 g. What is the molecular formula of the compound?
The atmospheric pressure 4.The volume for the vapor to occupy above the liquid 5.The temperature of the liquid
a rock contains .441 g of Pb-206 to every 1.00 g of U-238, assuming the rock did nto cantain any Pb-206 at the timeof its formation, how old is the rock?
Calculate the amount of heat required to completely sublime 78g of solid dry ice at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3kJ/mol .
Sulfuryl chloride (SO2Cl2) in the gas phase decomposes to sulfur dioxide and chlorine gas. A) what is the rate law? B) What is the value of the rate constant (k)?
Calculate [H+] and the pH of the following solutions
How much heat energy is required to raise the temperature of 0.368 of copper from 23.0 to 60.0 ? The specific heat of copper is 0.0920 .
You need to make a 500 mL buffer containing 35 mM NaCl and 50 mM Tris buffer. You already have a 5 M NaCl stock solution and a 1 M
when 0.198 g of KHP is tritated with NaOH it requires 27.80 mL of NaOH to reach the endpoint of the reaction. Calculate the molarity of the NaOH solution.
In some solar-heated homes, heat from the sun is stored in rocks during the day and then released during the cooler night. (a) Calculate the amount of heat required to raise the temperature of 78.7 kg of rocks from 25.0°C to 43.0°C.
A 0.264-gram sample of an amino acid was dissolved in 95.0mL of water and titrated with 0.105M NaOH. The first equivalence point was found at V(OH)=16.3mL.
What is the volume of 290. mL of oxygen gas at 112°C and 790. mm Hg if the conditions are adjusted to STP? Assume the amount of gas is held constant.
calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400.0g of H2O
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