Chemistry, 11.11.2020 17:50 skylar7192
What does Hess's law state can be done in order to be able to react solid magnesium with oxygen gas safely (that is, without exposing the magnesium to flames)?A. More moles of solid magnesium can be added until the reaction is safe. B. More moles of oxygen gas can be added until the reaction is safe. C. The reaction can be broken down and performed in steps. D. The phase state of the reactants can be changed to match each other. E. The phase state of the products can be changed to match each other.
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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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What does Hess's law state can be done in order to be able to react solid magnesium with oxygen gas...
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