Chemistry, 12.09.2019 02:30 naajaae5040
Experiment: leo placed two circles of paper in a petri dish (something used for growing bacteria). one circle of paper was soaked in penicillin. the other had nothing on it. he poured a liquid filled with bacteria into the petri dish which covered both papers. both circles of paper were placed in the petri dish about 3 cm apart. at the end of the experiment, there were no bacteria growing in the circle soaked in penicillin. the other circle of paper had bacteria that were growing well. what was the control
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Chemistry, 22.06.2019 11:00
Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean
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Chemistry, 22.06.2019 16:00
As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit
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Chemistry, 22.06.2019 19:30
Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.
Answers: 1
Chemistry, 22.06.2019 20:20
Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa
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Experiment: leo placed two circles of paper in a petri dish (something used for growing bacteria)....
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