Chemistry, 08.07.2019 18:00 andreaolvera
Why is chemistry a science but alchemy was not? a. chemistry is done by chemist whereas alchemy was done by aristotle. b. chemistry uses experiment to test ideas whereas alchemy used evidence. c. chemistry deals with many elements whereas alchemy dealt with only four elements. d. chemistry uses experiments to test ideas whereas alchemy used superstitious practices.
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Chemistry, 22.06.2019 01:30
If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)
Answers: 3
Chemistry, 22.06.2019 02:00
What is the maximum number of electrons that an atomic orbital can contain?
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
How is the shape of the poem “peer” connected to its meaning?
Answers: 2
Why is chemistry a science but alchemy was not? a. chemistry is done by chemist whereas alchemy wa...
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