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Question- An environmental scientist developed a new analytical method for the determination of cadmium (Cd2) in mussels. To validate the method, the researcher measured the Cd2 concentration in standard reference material (SRM) 2976 that is known to contain 0.82 ± 0.16 ppm Cd2. Five replicate measurements of the SRM were obtained using the new method, giving values of 0.794, 0.761, 0.826, 0.845, and 0.776 ppm Cd2.
Calculate standard deviation, mean and 95% confidence interval.
I am not able to determine the correct answer for the above question please helps me to get the correct answer
In the fingerprint region of the IR spectrum, what do the absorptions at 746 and 688 cm-1 tell you about the substitution pattern of this compound
Question- The bond length in the ^14NH3 is 101.2 pm and HNH bond angle 106.7*. Calculate the energy levels for the rotation about and perpendicular to its symmetry axis at J=1.
Your next step is to quantify the protein in the unknown mixture. Using any of the items needed above, describe how you would determine how much protein is in your sample.
hydrogen peoxide decays into water and oxygen in a first-order process at 20 degrees celcius. H2O2 yeilds H2O and 1/2 O2 the rate expression is 1.77X10 -5 [H2O2] what is the half life in hours of h2o2.
Explain how would prepare 2.5 mL. of a solution with an equal pAg from 7.5 to AgNO3 and Ag2SO4. Remember that the pAg will serve to determine the concentration of Ag + in solution.
A red blood cell in a hypertonic solution will shrink in volume as it undergoes crenation. In a hypotonic solution, a red blood cell will swell and possibly burst as it undergoes hemolysis.
A weather balloon at Earth's surface has a volume of 4 L at 294 K and 746 mm Hg. If the balloon is released and the volume reaches 4.19 L at 715 mm Hg.
Liquid sodium can be used as a heat transfer fluid. It's vapor pressure is 40.0 torr at 633 Celsius and 400.0 Torr at 823 Celsius. Calculate its heat of vaporization.
If 77.0 mL of hydrogen gas is collected over water at 50.0 degrees celsuis and 763 mm Hg, what is the volume of dry gas at standard conditions? The vapor pressure of water is 92.5mm Hg at 50.0 degrees celsuis .
Given below is a table ...on the right are the molarities and percent transmittance (at fixed path length and wavelength) For three known solutions and an unknown solution of a compound in water: Which one of the following values is possible as the m..
Calculate the equilibrium concentration of HC2O4- in a 0.20 M solution of oxalic acid.
additioonal feat dexter and mandark team up in order toprevent the asteroids from destroying earth. they start
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