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Suppose that you are working as a lab technician for a world famousarcheologist and upon returning from an extended field trip toCentral America, you are assigned a box of precious metal objectsfrom the latest digging expedition. Your boss has asked youto determine what the objects are made of but resources are verylimited by budgetary cuts at the University. Most of theobjects appear to be made of gold but your supervisor wants to becertain of his findings as you prepare for publication.
You have at your lab the following equipment: waterpurification units; laboratory glassware of all sorts; digitalbalances accurate to the milligram and microgram scale; and, acomputer with high speed internet access. The boss leaves arather scripted note on your desk with the name "Archimedes anddensity" written on it, but he heads off to Europe before you canask any questions.
Using creative lab procedures, you determine the density ofthe two largest objects to be exactly 17.5 grams/cm^3. Howdid you do this?
1. What is the problem or the question to be solved?2. How was the problem solved? a. What was the hypothesis that was tested? b. What are the variables that were used?3. Based on your answer to #2, how was the hypothesistested?4. Based on the experimental results, what sources of errorexist in the process?5. What can you concluded based on the results?
Gasohol is a mixture of ethanol and gasoline used to increase the oxygen content of fuels, and thus reduce pollutants from automobile exhaust
The melting point of tropylium bromide is above 200 degree C, quite high for an organic compound. How can you account for these experimental observations?
Calculate the pH of a buffer solution with .10 moles of C2H5COOH and .13 moles of C2H5COONa in 1.5L
Using the concepts of equilibrium and Le Chatelier's principle, explain why oxygen moves from the air in the lungs to cells and carbon dioxide moves from cells to the air in the lungs.
why is hcl used in the preparation of sni2 instead of aceticacidacetic anhydride? please explain in detail.glacier
The normal range for the carbonyl of a ketone is 1715 cm-1. Why does the carbonyl peak for cyclopentanone appear at 1750 cm -1
Complete and balance the equation for this reaction in acidic solution. Phases are optional
How many mL of 16 M NH3 are needed to prepare 2.00 L of a 2.00 M solution? 2. How much NaCl is present in 25.0 mL of a 12.0% (w/v) solution
Write a net ionic equation, including states for teh reaction of Cobalt (II) Chloride and Silver Nitrate 2. Circle the species in which nitrogen has the highest oxidation number
When looking at an energy diagram, how do you determine what the rate-limiting step is? How do you determine what the energy of activation is for the rate determining step
Draw the major organic product formed by reaction of 3-hexyne with the following reagent: Cl2 (1mol)
How much heat is produced in burning 8 mol of CH4 under standard conditions if reactants and products are brought to 298 and H2 O(l) is formed. What is the maximum amount of useful work that can be accomplished under standard conditions by this sy..
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