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Chapter 1: Q21P (page 22)
The concentration of the alkane (FM 282.56) in a particular sample of rainwater is . Assume that the density of rainwater is close toand find the molar concentration of .
The molar concentration of is
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What is the formal concentration (expressed as ) ofNaCI when 32.0gare dissolved in water and diluted to 0.500L?
If the mass of isolated were 0.300 g, what would be the average mass of iron per tablet?
Dust falls on Chicago at a rate of \(65mg{m^{ - 2}}da{y^{ - 1}}\). Major metallic elements in the dust include\(Al,Mg,Cu,Zn,Mn\), and \(Pb{.^3}Pb\) accumulates at a rate of \(0.03mg{m^{ - 2}}\) day \(^{ - 1}.\)How many metric tons (1 metric ton \( = 1000\;kg\)) of \(Pb\)falls on the 535 square kilometers of Chicago in 1 year?
A person swimming at 2miles per hour requires 360+46Calories per hour per 100pounds of body mass. Express the energy use in kJ/hper kg of body mass. (Answer: 37kJ/hper kg)
A cell in your adrenal gland has about tiny compartments called vesicles that contain the hormone epinephrine (also called adrenaline).
(a) An entire cell has about f epinephrine. How many attomoles (amol) of epinephrine are in each vesicle?
(b) How many molecules of epinephrine are in each vesicle?
(c) The volume of a sphere of radius r is . Find the volume of a spherical vesicle of radius 200nm. Express your answer in cubic meters and liters, remembering that .
(d) Find the molar concentration of epinephrine in the vesicle if it containsof epinephrine.
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