Chemistry, 20.10.2021 08:30 kearahbillups677
You are measuring lead by atomic absorption spectroscopy, a technique that is known to respond linearly to lead concentration. One 10.0 mL portion of river water is added to a 25.00 mL volumetric flask and diluted to the mark. A second 10.0 mL portion is added to another 25.00 mL volumetric flask. 5.00 mLs of a standard solution containing 4.0 ppm Pb are added to the second flask which is then diluted to the mark. The measured absorbance for the first flask is 0.178. The measured absorbance for the second flask is 0.287. Use this information to calculate the concentration of lead in the river water.
Answers: 1
Chemistry, 22.06.2019 04:30, rosetoheart2
What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics
Answers: 1
Chemistry, 22.06.2019 06:00, hdjsjfjruejchhehd
The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.
Answers: 1
Chemistry, 22.06.2019 10:10, babyphoraaaaa
For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate, m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2
Answers: 3
You are measuring lead by atomic absorption spectroscopy, a technique that is known to respond linea...
Geography, 04.11.2019 23:31
Arts, 04.11.2019 23:31
Social Studies, 04.11.2019 23:31
Mathematics, 04.11.2019 23:31