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Chemistry, 26.07.2019 03:30, pickles3233
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. if the flask volume is 1.50 l, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?
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Answers: 1
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Chemistry, 21.06.2019 18:30, ciarakelly636owuiup
Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?
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Chemistry, 23.06.2019 05:00, xxaurorabluexx
Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.
Answers: 2
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