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A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of = 1.20 (where a femtogram, fg is 10^-15 and is swimming at a velocity of = 5.00 , with an uncertainty in the velocity of 4.00 %. E. coli bacterial cells are around 1 (mu)m ( 10^-6 m) in length. The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing. She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. What is the uncertainty of the position of the bacterium?
In a concentration cell established using 0.120 M Ag+ solution and a saturated AgCN solution, the measured Ecell is 0.8500 V. Calculate the molarity of the Ag+ ion in the saturated solution.
consider the titration of 25.00ml of 0.650 M propanoic acid, HC3H5O2 ( Ka = 1.3 X 10^-5), with 0.750 M sodium hydroxide, NaOH, and answer the following questions?
How far will the protein travel in one hour in an electrophoresis gel at 25C when a field of 1.0 V cm^-1 is applied if the viscosity of the gel is 0.891 cP
For many years drinking water has been cooled in hot climates by evaporating it from the surfaces of canvas bags or porous clay pots. How many grams of water can be cooled from 39°C
An emission line in the hydrogen spectrum appears in the infrared region at 956 nm. What transition produced this line? Clearly indicate both nf and ni.
Breathalyzers determine the alcohol content in a person's breath by the following (unbalanced) redox reaction:
what is the maximum mass of product (oil of wintergreen) that could be formed? The density of methanol is 0.791 g/mL.Give your answer in grams with 3 significant figures.
Write an equation for your preparation of acetyl chloride
Why does the thermal conductivity detector respond to all analytes except the carrier gas?
The molarity (moles/L = M) of a solution of 4.0 g NaOH in a total volume of 100.0 mL (or 40 g in 1.0 L) is what?
If the absorbance of one of your samples is off scale, what is the most likely problem?
When heated, ammonium carbonate decomposes as follows. NH4CO2NH2(s) ->2 NH3(g) + CO2(g) At a certain temperature the equilibrium pressure of the system is 0.318 atm. Calculate KP for the reaction.
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