Chemistry, 20.10.2020 02:01 michaelcarroll4228
lam supposed to recover a 60.0 ppm (parts per million) concentration of matrix spike after running an assay (procedure). I ran the assay 4 times and got concentrations of 42.6 ppm, 43.5 ppm, 41.9 ppm, and 42.3 ppm. Are my results accurate? Precise? Why?
Answers: 2
Chemistry, 22.06.2019 12:00, zamariahyou
A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?
Answers: 1
Chemistry, 22.06.2019 23:00, lufung8627
Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
Answers: 1
lam supposed to recover a 60.0 ppm (parts per million) concentration of matrix spike after running a...
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