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A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 1.60 fg (where a femtogram, fg, is 10^-15g) and is swimming at a velocity of v = 7.00 μm/s , with an uncertainty in the velocity of 2.00 %. E. coli bacterial cells are around 1 μm ( 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?
Express your answer with the appropriate units.
How much heat does your body lose when 3.35g of sweat evaporates from your skin at 25 degrees celsius? (Assume that the sweat is only water.) The heat of vaporization of water at 25 degrees celsius is 44.0 kJ/mol.
sample of a 0.116M potassium sulfate solution is mixed with 38.5mL of a 0.126M lead(II) acetate solution and this precipitation reaction occurs:
What volume (in liters) is occupied by 0.01 moles of carbon monoxide
Calculate the mass of a sample of iron (in kilograms) which contains the same number of atoms as 0.8118 L of mercury metal (density of mercury is 13.534 g/cm3).
What is the alkali-aggregate reaction? List some of the rock types that are vulnerable to attack by alkaline solutions. Discuss the effect of aggregate size on the phenomenon.
which of the following is a neutralization reaction?a. kcl nano3 --gt kno3 naclb. hno3 koh --gt h2o kno3c. h2o so3
When this sample was reacted with excess hydrochloric acid, 315.23 mL of hydrogen gas, collected over water at a barometric pressure of 757.1 torr and a temperature of 21.3 C was generated. A) Determine the number of moles of hydrogen gas generate..
in the laboratory a student combines 45.9 ml of a 0.197 m magnesium bromide solution with 16.1 ml of a 0.541 m cobaltii
Write balanced (a) molecular, (b) overall ionic, and (c) net ionic equations for the reaction between an aqueous solution of phosphoric acid, H3PO4(aq), and an aqueous solution of sodium hydroxide. The products are sodium phosphate and water.
a sample of smoke stack emission was collected into a 1.25l tank at 730mmhg and analyzes. the analysis showed 92 co2
A copper zincs voltaic cell is constructed using 100 ml solutions if 1 M solutions of copper sulfate and zincs sulfate with a sodium sulfate salt Bruges.
A sample of methane gas at a pressure of 0.801 atm and a temperature of 26.9oC, occupies a volume of 687 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.438 atm, the volume of the gas sample will be
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