Chem lab questions for (extracting caffeine from tea bag water using dichloromethane --> filtered --> steamed --> obtain caffeine )
1. does tlc give a conclusive identification of caffeine ( extracted from tea bags) ? why or why not?
2. is the extract a pure compound or mixture of compounds? explain
Answers: 1
Chemistry, 22.06.2019 07:30
The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
Answers: 3
Chemistry, 22.06.2019 14:20
Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments
Answers: 1
Chemistry, 22.06.2019 17:00
Complete each row of the table below by filling in the missing prefix or missing exponent.
Answers: 1
Chem lab questions for (extracting caffeine from tea bag water using dichloromethane --> filtere...
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