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How does the biocomplexity concept help us understand the relationships between human activities and natural systems, which are critical for sustainability?
How many grams of salicylic acid and of acetic anyhydride should she use? refer to the following reaction: 2 C7H6O3 + C4H603 -> 2 C9H8O4 + H20
How many grams of SO2 can you make from 11.40g of H2O?
the piston of a vertical piston-cylinder device containing a gas has a mass of 200 kg and a cross-sectional area of
Deduce from these data the corresponding equation and write the formulas for the oxide and sulfate of M. Using the smallest whole number coefficients write the balanced equation for the reaction of the metal M with hydrochloric acid.
if you had excess chlorine how many moles of of aluminum chloride could be produced from 17 grams of aluminum
Penicillase is an enzyme secreted by bacteria to inactivate the antibiotic penicillin. The enzyme has a molar mass of 30,000 and a single active site. The catalytic rate constant is 2000 s-1 and the Michaelis constant is KM = 5 x 10-5 M.
Describe how a phospholipid differs from other fatty acids. How does this difference allow the formation of a bilayer in an aqueous medium
How many moles of NaBrO should be added to 1 l of 0.200 M hypobromous (HBrO) acid to obtain a buffer of pH 8.80 (assume no volume change occurs when solid NaBrO is added)? The pka of the acid is 8.70.
How much work (in {\rm J}) is required to expand the volume of a pump from 0.0 {\rm L} to 2.6 L against an external pressure of 1.2 atm
An electron traveling at 2.5×105m/s has an uncertainty in its velocity of 1.18×105m/s . What is the uncertainty in its position? Express your answer with the appropriate units.
A solution is made that is 1.1×10^?3 M in Zn(NO3)2 and 0.150 M in NH3. After the solution reaches equilibrium, what concentration of Zn2+(aq) remains
A 8.750-gram sample of a hydrocarbon is burned in a furnace and 27.456 grams of CO2 and 11.239 grams of H2O are collected. If the molecular weight of the compound is 98.18 grams/mole, what is the molecular formula of the hydrocarbon
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