Questions from General Chemistry

Q: Calculate the binding energy per nucleon Eb/A in MeV for

Calculate the binding energy per nucleon Eb/A in MeV for the carbon isotope 6 12

Q: The data below is the nitrogen content of soil specimens collected in

The data below is the nitrogen content of soil specimens collected in Black Hawk County, Iowa (Professor M. E. Thompson, Iowa State University). Determine the arithmetic mean and geometric mean soil n...

Q: The following dose-response curve plots the central estimate of the

The following dose-response curve plots the central estimate of the adverse (toxic) response from a series of doses. The dose (i.e., body burden) is plotted on a base-10 logarithmic scale (dose units:...

Q: For six years, a child has been drinking water containing

For six years, a child has been drinking water containing 0.05 mg dm−3 benzene (CAS Registry Number 71-43-2). Estimate the average daily dose ADD for a child in this case, taking into account the natu...

Q: Table 2.1 lists the physical and water retention data for

Table 2.1 lists the physical and water retention data for the Macksburg soil series from Madison County Iowa. The Macksburg soil is located on nearly level (0-2% slopes) upland sites, has moderately h...

Q: The Robbs soil from Johnson County, Illinois has a moist bulk

The Robbs soil from Johnson County, Illinois has a moist bulk density of ρt = 1.34 M g • m−3 and a field-capacity volumetric water content of θfc = 0.38 cm•cm−1. The solids-water partition coefficient...

Q: The Macksburg soil (Madison County, Iowa) has a retardation

The Macksburg soil (Madison County, Iowa) has a retardation coefficient of Rf = 42.2 for the herbicide Atrazine (CAS Registry Number 1912-24-9). In early spring the Macksburg soil is at field capacity...

Q: The Antigo soil (Langlade County, Wisconsin) has a retardation

The Antigo soil (Langlade County, Wisconsin) has a retardation coefficient of Rf = 3.90 for the organophosphate insecticide Phosmet (CAS Registry Number 732-11-6). The Antigo soil has a field capacity...

Q: The volumetric moisture content of a fine-sand soil is θ

The volumetric moisture content of a fine-sand soil is θ = 0.12 m3 • m−3. Use the empirical Clapp-Hornberger water retention function in Appendix D to estimate the tension head htension at this water...

Q: Use the empirical Clapp-Hornberger unsaturated hydraulic conductivity function in Appendix

Use the empirical Clapp-Hornberger unsaturated hydraulic conductivity function in Appendix D to estimate the hydraulic conductvity kD of a loam- texture soil at field capacity.