Chemistry, 02.11.2019 05:31 Ezekielcassese
Astudent in lab prepared a cereal sample solution for spectroscopic analysis as described in the lab manual, and found the concentration of fe3+ in the sample to be 2.50 x 10โ5 m. if her sample solution was prepared by diluting 25 ml of the original solution to a total volume of 100 ml, what is the concentration of the original solution?
Answers: 2
Chemistry, 22.06.2019 04:30
How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer
Answers: 1
Chemistry, 22.06.2019 12:30
Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
Answers: 3
Chemistry, 22.06.2019 19:30
How might this scientific phenomena be explained? a paper clip floats on water.
Answers: 1
Astudent in lab prepared a cereal sample solution for spectroscopic analysis as described in the lab...
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