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Calculate the RSD of the data below. 70.24, 70.22 and 70.10
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- A sample is analyzed for chloride using the Volhard method. What is the percentage chloride as NaCl using the following data? Weight of sample: 303.0 mg AgNO3 used: 40.00 mL of 0.1234 M KSCN used: 12.20 mL of 0.0930 MHow to plot an overlay graph for FTIR. How must the sample extracts be shown on an overlay graphThe average concentration of cadmium (Cd) in tea leaves sample is 68.0(±1.5) ppm Cd. If the true concentration of Cd is 70.0 ppm Cd, then the relative % bias is: -1.86 % +1.86 % -2.86 % +2.86 %
- Give equation and explanation for Sevcick analysisGive typed answer not written You send a sample of rice to the lab for the determination of the total arsenic content. The analyst dissolves 525 mg of the rice in 5.0 mL of concentrated acid and then dilutes the solution to a final volume of 20.0 mL. When analyzed by ICP-MS, the solution concentration is found to be 20 µg L-1. What is the concentration of arsenic in the rice (in µg kg-1)?The gravimetric factor used to express CoCBr6·H20 in a sample that is finally weighed as PbClBr is choose below: FW PbClBr / 6 x FW CoCBr6·H20 FW CoCBr6·H20 / FW PbClBr FW CoCBr6·H20 / 6 x FW PbClBr 6 x FW PbClBr / FW CoCBr6·H20