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A. What is the mass in grams of 4.12 moles of CaCO3? How many moles are in 75.0g of CCl4?
The only two accessible conformations of a protein differ by 2kJ/mol. What percentage of protein molecules will be in the higher energy state at 350K? at 270K
What is the specific heat of a substance that it takes 192 Joules to raise the temperature of 45 grams by 6 degrees Celsius
a 0.8054 g sample of an unkown monoprotic acid requires 44.30 mL of the same solution to reach the same endpoint. what is the molar mass of the unknown monoprotic acid
Plutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power reactors. It has a half-life of 24,400 years. A student determines that it will take 97,600 years for the radioactivity of a Pu-239 sample to drop to one-..
An evacuated (empty) 276 mL glass bulb weighs 129.6375 g. Filled with an unknown gas, the bulb weighs 130.0318 g. Calculate the gas density in g/L.
a 50.00-ml sample of 0.100 m koh is titrated with 0.152 m hno3. calculate the ph of the solution after 52.00 ml of hno3
Enough of a monproctic acid is dissolve in water to produce a 0.0147 M solution. The pH of the resulting solution is 2.31. Calculate the Ka for the acid.
the density of plutonium metal is 19.84 g/cm3 , and the density of plutonium (IV) oxide is 11.46 g/cm3. over a period of 7-10 years, a 2.5-kg sample of plutonium metal stored at Los Alamos National Laboratory in New Mexico was converted to plutoni..
A dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.124 g sample was studied by combustion analysis, 0.223 g of CO2 and 0.0301 g of H2O formed.
a chemist weighed out 5.25 g of a mixture containing unknown amounts of baos and caos and placed the sample in a 1.50-l
Phosphatidylethanolamine and PIP2 containing identical fatty acyl residues can be hydrolyzed at the same efficiency by phospholipase C. Will the hydrolysis products of the two lipids have the same effect on protein kinase C
What is the approximate thermal energy in kJ/mol of molecules at 0° C. Express your answer to the nearest 0.1 kJ/mol
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