Engineering, 21.01.2021 22:50 mpchop
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
Answers: 1
Another question on Engineering
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Engineering, 04.07.2019 18:20
Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.
Answers: 3
Engineering, 04.07.2019 18:20
The characteristic roots of a dynamic system are: 1.7920 1.8160 i, -1.7920 1.8160 i, -0.4160 what is the order of this system? what are the settling time and damping ratio of the system?
Answers: 3
You know the right answer?
The toxicity of DDT (C14H9Cl5) led to a ban on its use in the United States in 1972. Determinations...
Questions
History, 26.10.2021 22:50
Mathematics, 26.10.2021 22:50
English, 26.10.2021 22:50
Biology, 26.10.2021 22:50
Mathematics, 26.10.2021 22:50
Mathematics, 26.10.2021 22:50
Physics, 26.10.2021 22:50
Mathematics, 26.10.2021 22:50
