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Chemistry, 21.06.2019 15:30
Which of the following mining methods disrupts the sea floor?
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Chemistry, 22.06.2019 10:00
Part 1: include important facts found through your research. part 2: include your visual display. include your summary of βthe chemistry of waterβ from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
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Chemistry, 22.06.2019 16:50
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
Answers: 1
a martian that has lived all its life on Mars finally makes a trip to earth. it has a hard time movi...
Mathematics, 24.07.2019 07:30
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History, 24.07.2019 07:30
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Mathematics, 24.07.2019 07:30
Mathematics, 24.07.2019 07:30
Mathematics, 24.07.2019 07:30