Chemistry, 14.04.2020 19:21 porkhappycom
A 50.0-mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a volume of 200.0 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured as 127 on an arbitrary scale. Under similar conditions, a 25.0 ppm standard quinine solution had a fluorescence intensity of 193.
(a) Calculate the mass of quinine in the original tonic water sample.
Answers: 1
Chemistry, 21.06.2019 16:00
Endeleev saw trends in the physical and chemical properties of elements when he organized them by
Answers: 2
Chemistry, 22.06.2019 12:00
What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist
Answers: 2
Chemistry, 22.06.2019 16:30
Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?
Answers: 2
Chemistry, 22.06.2019 22:10
Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.
Answers: 1
A 50.0-mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of qu...
SAT, 15.01.2021 04:30
History, 15.01.2021 04:30
English, 15.01.2021 04:30
Chemistry, 15.01.2021 04:30
Mathematics, 15.01.2021 04:30
Business, 15.01.2021 04:30
Health, 15.01.2021 04:30
English, 15.01.2021 04:30
Physics, 15.01.2021 04:30
Geography, 15.01.2021 04:30
History, 15.01.2021 04:30
Mathematics, 15.01.2021 04:30
English, 15.01.2021 04:30
Mathematics, 15.01.2021 04:30
English, 15.01.2021 04:30