The toxicity of DDT (C14H9Cl5) led to a ban on its use in the United States in 1972. Determinations of DDT concentrations in groundwater samples from Pennsylvania between 1969 and 1971 yielded the following results: tion Mass of DDT 0.0290 mg 0.0340 mg 0.600 mg ample Size 48 mL Orchard Residential Residential after a storm 1.79 L 9.0 mL
Express these concentrations in millimoles per liter
1st attempt
Part 1 (1 point)
Orchard mmol/L
Part 2 (1 point)
Residential mmolVL
Part 3 (1 point)
Residential after a storm mmol/L

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10