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Chemistry, 22.06.2019 11:40
Enzymes affect the reactions in living cells by changing the
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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 21:30
What is happening when the water inside a kettle heats up and begins to boil
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Atoms of which element have the most valence electrons? a. silicon (si) b. calcium (ca) c. alumi...
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