Chemistry, 19.03.2021 02:20 glowbaby123
A student performed a caffeine extraction on two Vivarin tablets, which are advertised to contain 200 mg caffeine in each 2 g tablet. The student follows the lab extraction protocol and weighs 328 mg of caffeine, wet. What is the crude percent isolation (or percent recovery) for this extraction
Answers: 2
Chemistry, 22.06.2019 02:00
Write a hypothesis that answers the lesson question, βwhile observing a chemical reaction, how can you tell which reactant is limiting? β hypothesis: if a substance is the limiting reactant, then . . because . .
Answers: 1
Chemistry, 22.06.2019 09:00
This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.
Answers: 3
Chemistry, 22.06.2019 13:00
16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 β 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.
Answers: 2
A student performed a caffeine extraction on two Vivarin tablets, which are advertised to contain 20...
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