In the video, the water level was 15 milliliters before adding the chain, and 20 milliliters after adding the chain. When I weighed the chain, its mass was 68.2 grams. I believe the chain is solid metal (not gold plated), but is probably a blend of gold and other metals. I looked up that gold has a density of 19.3 g/ml, while the other metals like silver and copper usually blended with gold have a combined density of about 9.7 g/ml. Determine what percentage of the chain is gold, by mass, to at least 1 decimal place?

In the video, the water level was 15 milliliters before adding the chain, and 20 milliliters after adding the chain. When I weighed the chain, its mass was 68.2 grams. I believe the chain is solid metal (not gold plated), but is probably a blend of gold and other metals. I looked up that gold has a density of 19.3 g/ml, while the other metals like silver and copper usually blended with gold have a combined density of about 9.7 g/ml. Determine what percentage of the chain is gold, by mass, to at least 1 decimal place?

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...

See similar textbooks

Similar questions

I don't understand how to solve this problem. I already tried solving it but didn't get one of the listed answers.
I need help solving this for my chem homework please A friend of yours went panning for gold last weekend and found a nuggetthat appears to be gold. With your newfound scientific prowess, you setout to determine if it is really gold. Your tests show that the nugget has amass of 7.6 g. Immersing the nugget in water raised the volume from 7.22mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell yourfriend?
A chemist prepares a solution of nickel(II) chloride (NiCl₂) by measuring out 2.1 × 10² μmol of nickel(II) chloride into a 350. mL. volumetric flask and filling the flask to the mark with water. Calculate the concentration in μmol/L of the chemist's nickel(II) chloride solution. Round your answer to 2 significant digits. 0 μmol L x10
A student is trying to determine the volume of a flask and compare it to the known volume. After performing the measurements 10 times, the student calculates an RSD of 2 ppt, with a percent error of 24%. Which of the following statements about the results are correct? The results are neither accurate nor precise. The line fits the points on the calibration curve well. The results are precise, but not accurate. The results are accurate, but not precise. The results are precise and accurate.
The questions is as follows: The World Health Organization drinking water standard for arsenic is 10.0 micrograms/liter. Los Angeles watter is 5 ppb (parts per billion) arsenic. Convert the WHO arsenic standard to ppb and determine whether Los Angeles water is above or below the standard. (Assume that the density of the water is 1.00 g/cm^3)
Tubes 1-4 are standards with known mass and known volume of 200µL. Tubes 5-7 are unknowns that have been diluted 1/100 and volume used 200μL. How do you work out the concentration of tubes in g/L using a standard curve to work out the initial mass of unknowns. Tube No. 1 2 3 4 5 6 7 Protein amount (ug) 0 50 100 200 Absorbanc e (750nm) 0 0.32 0.5005 0.824 0.612 0.805 0.69
A chemistry student weighs out 0.170 g of citric acid (H₂CH₂O₂), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1700 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Be sure your answer has the correct number of significant digits. 0mL x10 X
The Answer = 841.7 mm
You are given a "Gold Crown" to determine whether it is made of pure Gold or not. It has a mass of 675 grams when it is weighed in the air. Then it is submerged in oil (with density of 957 kg/m^3), it reads 640 grams. 7. Find the density of the Crown. Compare to the Gold density 19320 kg/m^3, is it really pure Gold?
A chemistry student weighs out 0.0176 g of formic acid (HCHO2)into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1300 M(molarity) NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.
You have a stock solution certified by a manufacturer to contain 245.0 ± 0.4 µg SOź¯/mL. You would like to dilute it by a factor of 100 to obtain 2.450 µg/mL. Two possible methods of dilution are stated. For each method, calculate the resulting absolute uncertainty in concentration. Use the manufacturer's tolerances in the table for uncertainties. Glassware Tolerance 1-mL transfer pipet ±0.006 mL 10-mL transfer pipet +0.02 mL 100-mL volumetric flask +0.08 mL Method A: Dilute 10.00 mL up to 100 mL with a transfer pipet and volumetric flask. Then take 10.00 mL of the dilute solution and dilute it again to 100 mL. 0.0049 absolute uncertainty: ± ug/mL Incorrect Method B: Dilute 1.000 mL up to 100 mL with a transfer pipet and volumetric flask. 0.4 absolute uncertainty: ± ug/mL Incorrect
5. The Malaysia National Standard for total amount of lead (Pb) in drinking water is 10 µg/L. Two laboratories reported average results for the analysis of two mineral water samples, which were 2.25 mM (sample A) and 1.05 x 10-5 % (in w/v, sample B). Based on the obtained data, decide if it is safe for you to drink the water?