Chemistry, 26.10.2019 08:43 alananicoleee
Penicillin. an important antibiotic (antibacterial agent), was discovered accidentally by the scottish bacteriologist alexander fleming in 1928, although he was never able to isolate it as a pure compound. this and similar antibiotics have saved millions of lives that would otherwise have been lost to infections. penicillin, like many of the molecules produced by living systems, is a large molecule containing many atoms. one type of penicillin, penicillin f, has the formula c14h20n2so4. compute the mass percent of each element in this compound.
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Chemistry, 22.06.2019 07:00, maryjane8872
Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils
Answers: 1
Chemistry, 22.06.2019 10:00, shayneseaton
The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation
Answers: 1
Penicillin. an important antibiotic (antibacterial agent), was discovered accidentally by the scotti...
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