Help me it’s science
...
Answers: 1
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.
Answers: 3
Chemistry, 22.06.2019 15:00
Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude
Answers: 2
Chemistry, 23.06.2019 01:30
Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?
Answers: 1
Chemistry, 23.06.2019 05:30
Scientist think that animals with remarkably similar embryo development probably shared a common ancestor
Answers: 1
Computers and Technology, 23.09.2019 15:50
Mathematics, 23.09.2019 15:50
Chemistry, 23.09.2019 15:50
Spanish, 23.09.2019 15:50
Computers and Technology, 23.09.2019 15:50
Mathematics, 23.09.2019 15:50
English, 23.09.2019 15:50
Physics, 23.09.2019 15:50
Biology, 23.09.2019 15:50
Biology, 23.09.2019 15:50
History, 23.09.2019 15:50