Chemistry, 28.10.2019 19:31 kevonmajor
In the early twentieth century, what was alexander fleming’s hypothesis concerning the relationship between a yellow-green mold and certain strains of bacteria?
a. he thought the bacteria had released a chemical that caused the mold to grow. b. he thought the bacteria fed on the mold, causing it to shrink and disappear.
c. he thought the mold had released a chemical that prevented the bacteria’s growth.
Answers: 1
Chemistry, 21.06.2019 20:10
Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.
Answers: 2
Chemistry, 22.06.2019 10:50
A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.
Answers: 3
In the early twentieth century, what was alexander fleming’s hypothesis concerning the relationship...
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