Dillard's Lab 1-4

60+ 50 True False 40- kcal/mol 30 20 10 0 course of rx The reaction will proceed spontaneously

Concentration (mg/ml) Time (min) 8.5 0.5 6.8 5.4 1.5 4.0 2 3.2 2.5 2.5 3 What will be the slope of the line using the given first and second values? What will be the y-intercept, still using the given first and second values? Completely state the equation of the line. nlcot olN5

3. Corev was synthesizing a chemical in the laboratory. He used different purification techniques to try to obtain a pure compound. The melting point of the pure compound is 65 degrees. When he tested his compound in the lab the melting point he obtained was 62-68 degrees. Is the product he synthesized pure? 4A company was low on copper metal and decided to use some chemical additives just this once to some copper wiring they were installing in a house. How will this impact the conductivity of the wiring?

= O ORGANIC FUNCTIONAL GROUPS Naming and drawing unsubstituted amides Draw the skeletal ("line") structure of N,N-dimethylethanamide. Click and drag to start drawing a structure. C™ X с S E 1/5 Kir

Concentration of Reagents (NH4)2S2O8 KI Na2S2O3 0.25 M 0.22 M 0.19 M Volumes of Solutions S₂082 (mL) Starch soln (mL) KNO3 (mL) EDTA soln (mL) KI (mL) S₂O32- (mL) x 5 9.7 0.9 26.4 0.5 9.9 1.1 Using the above data determine the concentration of I at the moment the reaction begins. HINT: This is a mixing problem. Determine the total number of moles of I and divide this amount by the total volume (in L). Be careful... If you go back and try this exercise again the values will change. Read the question carefully! Answer:

Hello, the priority to be answered would be page 1 (1st image). However, I can put part 2 (2nd image) on a new question/post. Just wanted to include that in this post for reference to whoever will answer it. Thank you!

Fill in the table

O Fash point of the given 272 °C=522 °F A flash point that is too low can be a fire hazard and may indicate contamination with Fire point of the given sample 320°C= 608°F more volatile components. Identify one volatile component in a petroleum mixture which may reduce the flash point of the mixture.

Chemistry Hello! Can you please explain why these answers are wrong? Thank you.

Consider the following drug molecule below for questions 1 - 4.1. Which choice accounts for the functional groups present in this molecule?   a. 2 phenyl; 1 amide; 2 amine b. 2 phenyl; 2 hydroxyl; 1 amine c. 2 phenyl; 1 hydroxyl; 2 amine d. 2 phenyl; 1 hydroxyl; 1 amide   2.  How many stereogenic centers are there in the molecule?   a. 2 b. 3  c. 4 d. 5   3. What is the primary electronic effect of the hydroxyl groups on the phenyl group?   a. -I; +M b. +I; +M c. +I; -M d. -I; -M 4. Which part of the molecule is vulnerable to hydrolysis?   a. Amide b. Amine c. Phenyl d. Hydrocarbon

The Ksp value for calcium sulfate [CaSO4] is 2.40 X 10-5 so if a professor made 1825 mL of a CaSO4lag) solution then how many grams of sulfate (SO42) ion would be present in this solution. 0.8345 gram SO42- ion 0.8588 gram SO42- ion 0.9331 gram SO42- ion 1.0036 gram SO42- ion 0.8921 gram SO42- ion 2.. 591..docx W- LAB EXP. #3 -.docx Show All

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

Blank 1 is the breakdown of chemical compounds in organic matter that results in the release of nutrients in soluble inorganic forms that are available to plants. Blank 1 Add your answer

Pre-lab question #4: Distinguish between volatile and nonvolatile substance. The word "volatile" refers to a substance that vaporizes readily. Volatility is a measure of how readily a substance vaporizes or transitions from a liquid phase to a gas phase. A A (volatile/nonvolatile) substance refers to a substance that does not readily evaporate into a gas under existing conditions. A AA (volatile/nonvolatile) substance is one that evaporates or sublimates at room temperature or below.

Dr. TS You found lead in blood collected from children living within 5 km from the Ship Channel. Calculate weighted average lead concentration (mg/L) in their blood. Age group (n) Average lead concentration (1ug/dL) 25 1-2 years (30) 3-4 years (50) 5-6 years (50) 7-8 years (40) 9-10 years (60) 30 35 40 40

How to determine the difference between primary , secondary and tertiary alcohol in the laboratory

please i really need your help with this

Part C: Determination of the alcohol content of unknown liquor Stretien Volume (mL) Sample ТИШТИНА 0.00% alcohol 10.0% alcohol 20.0% alcohol 40.0% alcohol 50.0% alcohol Unknown Mass (g) 1o podina ko 9.8919 9.7899 9.600 9 9.420 д % Alcohol content of the liquor_ 9.2155 9.5089 2VLELA CVOLION EAEK EVI OK DRA IVBOKY LOBAN ocen 10.00 10.00 10.00 10.00 10.00 10.00 Density (g/mL) 0.00% alcohol calculation: ися → о 0.99 во 0.99 Ano 7 si dotaW 120.00 supirmbest sdi na LANG 411 be: [scpoidas: 0.97 0.94 in oil to notisalarisi 0.92 0.95

I need help constructing graph I m not sure where to put values On the graph paper plot a graph of your reaction rates vs. concentration by using vertical scale or Y-axis representing reaction rate and a horizontal scale or X-axis representing mls of solution #1(KIO3).

3-3. The density of 2-methyl-2-butanol is 0.806 g/mL. How many mgs represent an aliquot of 430 µL? How many mmols represent an aliquot of 0.650 mL (2-methyl-2-butanol, formula weight is 88.15 g/mol)?

please answer all w

2- Lab Report 1 Post-Lab Part A How could you distinguish solution of sodium chloride (table salt) from a solution of sodium iodide (a poison) using an AgNO3 solution? Show reactions. Express your answers as balanced chemical equations. Identify all of the phases in your answer. Seperate the two equations by a comma. > View Available Hint(s) Submit Request Answer Part B Complete previous part(s) Provide Feedback

A solution is contaminated with traces of cadmium, manganese, and cobalt. Which option would be the safest way to make it safer for human consumption? ksp OH- CO32- S2- Cd2+ 2.5x10-14 1.8x10-14 8x10-28 Mn2+ 1.6x10-13 5.0x10-10 2x10-53 Co2+ 1.3x10-15 1.0x10-10 5x10-22 A bubble carbon dioxide into the water B raise the pH to about 12 C lower the pH to about 2 D increase the sulfide level

What is the purpose of Safety Data Sheets? Why are these important when handling common food service chemicals? What information/components are generally included? How do Safety Data Sheets vary?

Can I get detailed explanation for this table , mentioning the apparatus and when’s the timer is started ? What happens next

Please answer as much as I can

3. 3 M NaOH Reagent water Concentration of Stock to Prepare Calculate the grams of chemical needed for each stock listed below. 1% Lactose 1% Dextrose 16.7 ML 73.3ML 1% Sucrose 100 mL Total Volume of Stock Needed 10 mL 20 mL 25 mL 16.7m Amount of chemical Needed (in grams) Your instructor will have you make ONE of the above solutions-ask your instructor which solution t make.

Solution 1 Solution 2 Solution 3 Solution 4 Solution 5 Concentration iron(III) nitrate 0.00200 0.00200 0.00200 0.00200 0.00200 [Fe(NO3)3] (M) Concentration potassium thiocyanate 0.00200 0.00200 0.00200 0.00200 0.00200 [KSCN] (M) Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Volume KSCN (mL) 5.00 4.00 3.00 2.00 1.00 Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 Initial concentration [Fe3+] (M) 0.00100 0.00100 0.00100 0.00100 0.00100 Initial concentration [SCN‍] (M) 0.00100 0.000800 0.000600 0.000400 0.000200 Absorbance 0.269 0.192 0.154 0.104 0.052 Equilibrium [FeSCN2+] (M) 0.000198 0.000141 0.000113 0.0000765 0.000038 Equilibrium constant Kc Average Kc

Can you please help me with 5