A sample of a pure oxide of nickel was analyzed by heating to drive off the oxygen. A team of students weighed an empty test tube, recording a mass of 32.064 g. After adding a sample to the tube, they measured a total mass of 33.076 g. The team then heated the sample in an atmosphere of natural gas, reducing the sample to pure metal. The final mass after two heatings was 32.785 g for the tube and the metal residue. Perform calculations necessary to find results below, showing all of your work. a. Mass of nickel oxide sample b. Mass of nickel present in sample c. Mass of oxygen present in sample . Mass percent of nickel Mass percent of oxygen 0

A sample of a pure oxide of nickel was analyzed by heating to drive off the oxygen. A team of students weighed an empty test tube, recording a mass of 32.064 g. After adding a sample to the tube, they measured a total mass of 33.076 g. The team then heated the sample in an atmosphere of natural gas, reducing the sample to pure metal. The final mass after two heatings was 32.785 g for the tube and the metal residue. Perform calculations necessary to find results below, showing all of your work. a. Mass of nickel oxide sample b. Mass of nickel present in sample c. Mass of oxygen present in sample . Mass percent of nickel Mass percent of oxygen 0

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Write your complete solutions on yellow paper, round your answers to the appropriate number of significant figures, and box the final answer. The deadline for submission is at the end of the class. Note: You do not need to write your solutions for the items that can be derived from your calculators. 1. Three students (Saerom, Hayoung, and Jiwon) are asked to determine the ppm Ca in a drinking water sample by titration with EDTA. Each student performed five trials for the sample. The results in ppm Ca are the following: Saerom Hayoung Jiwon a. Get the mean, SD, and % RSD of each student's results. b. If the true value is 35 ppm, calculate the relative error of each student's results. c. Comment on the precision and accuracy of each student's results. The maximum % RSD and the relative error set by the lab is 5.0%. d. Use the following table to summarize your answers. Mean SD %RSD Relative Error Comment 31, 32, 33, 33, 32 35, 34, 34, 35, 34 35, 38, 33, 35, 37 Saerom Mean SD 95% CI…
Match each alcohol below to its proper category (primary, secondary or tertiary) CH3 ОН
STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.
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