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Nicotine, a stimulant found in tobacco, has the mass percent composition: C, 74.03%; H, 8.70%; N, 17.27%. The molar mass of nicotine is 162.23 g/mol. Find the molecular formula of nicotine.
protein used as standards on an SDS- polyacrylamide gel are 0.80 and 0.41, respectively. What is the apparent mass of a protein having a mobility of 0.62 on this gel?
when 0.500 l of a 2.00 m solution of Pb(NO3)2 is mixed with an excess of 1.00m solution of Ki, how many grams lead (II) iodide are formed? ( molar mass: Pb(NO3)2= 331 g;KI 166g; PbI2 =467 g; KNO = 101 g
what is the conduction electron density of copper/ Answer should be stated as number of conduction electrons per cubic meter.
a jet of water with a velocity v1 striking a vane45 degrees that is moving with a velocity vo. determine the forces
Show that the proton condition for a NH4Cl solution is a linear combination of the mass balance equations and the charge balance equation.
Compute the change in entropy for 0.5moles of an ideal gas with a temperature independent specific heat capacity of cp, m=2R that undergoes an irreversible change between each pair of states listed below.
Experiment Initial Initial Initial [A], Mol/L [B], Mol/L Rate 1 0.10 0.10 1.4 x 10^2 2 0.20 0.10 2.8 x 10^2 3 0.20 0.10 5.6 x 10^2 What is the rate law for the reaction. A) rate= k [A][B] B) rate= k [A]^2[B]^2 C) rate= k [A] D) rate= k [A][B]^2 E)..
A solution of ethanol (d=0.795 g/mL) and water is prepared by placing 30.0 mL of ethanol in a 250.0 mL volumetric flask and diluting with water to the flask etched mark. What is the molarity of the ethanol
a tank of helium gas at 25 degrees celcius has a pressure of 100atm and a volume of 50 liters how many 10 liter helium
How many grams of magnesium must react to displace 12.5 g of silver from a solution of silver nitrate?
A company is marketing a photovoltaic cell that it claims has an output of 320 W/m2 when tested at the standard 1000 W/m2 irradiation condition
kilimanjaro in tanzania is the tallest peak in africa 19340 ft.. on a particular day the barometric pressure at the top
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