102 Ex1 Chem (1)

urses/55527/quizzes/401369/take → # 3 Complete the data table using the calculation process you used to complete the previous question. Be sure to keep a copy of the completed table to include in the lab report for this experiment. $ Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 4 1.00 M Acetic Acid volume HC₂H3O2 25.0 mL 25.0 mL 25.0 mL 25.0 mL 25.0 mL Q Search f5 % moles 5 f6 Mole Ratio 6 HC₂H3O2 : NaHCO3 3:1 2:1 *All values should contain three (3) significant digits. 1:1 1:2 1:3 U hp NaHCO3 Molar Mass: 84.007 g/mol moles fg * 99+ 8 a fg mass needed DO 9 f10 ► 11

yout References Mailings Review View rt Endnote t Footnote ✓ w Notes es 5 Search Researcher Absorbance 5 4.5 4 3.5 2.5 2 1.5 1 0.5 0 Research 0 Insert Citation 1 1. Construct a standard curve in Excel by plotting concentration (in ppm) on your x-ax (unitless) on your y-axis for your known solutions. Label the axes on the graph and provi title. See Figure 5 in the lab handout for an example. Use a linear trendline to generate a data. Label the graph with the equation and the R2 value. Insert your labeled graph in the Help Manage Sources Style: [APA 2 Bibliography Citations & Bibliography Sciwheel Nitrate Standard Curve 3 4 ty=0.8842x-0.8191 R²=0.9509 Q..**. Concentration Insert Caption 5 6 Insert Table of Figure Update Table Cross-reference Captions ww 7 2. Using the equation from your graph, determine the nitrate concentration (in ppm) in each of samples. Text Predictions: On Accessibility: Investigate O Search 8509 FORGE *

Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3 #1 (salicylic acid) clear lilac 100% #2 (commercial aspirin A) clear slightly pink 50% #3 (commercial aspirin B) clear lilac 95% #4 (aspirin from your clear pink 20% synthesis above) #5 (control) clear clear 0% Based on this data and the melting point of Aspirin, how pure is the synthesized product?

A sample of rainwater was collected from four separate locations across theMetroplex. Each sample was measured once by two separate methods for the presence ofsulfate. Determine whether the two methods are equivalent with respect to giving thesame answer for [SO42-].

researchers working in a chemistry lab were examined anatomical structures of the brain using concentrated formaldehyde solutions. Once their studies concluded there remained 1.5 gallons of the substance and the researcher decided to pour this down the drain. In this case, they directly violet regulations put in place by which office?1. Office of research integrity 2. Institutional animal care and use committee3. Occupational safety and health administration 4. Institutional review board

HDPE and PS are both inert to bases and acids, which plastic would you rather chose to put 1 Liter of 6M HCl for general chemistry lab? Explain why.

. Be sure to understand what the dilutionfactor is for each sample (dilution factor = the number used to determine the actualconcentration of the stock UK after the diluted samples are analyzed) ?

Watch the following video (https://fod.infobase.com/OnDemandEmbed.aspx?lti=1&token=166850&wID=97629&loid=0&w=400&h=300) then answer the following questions about the following video. A) Explain in one paragraph why, in your opinion, forensic anthropology and bioarchaeology employ race or ethnicity according with the film. B) Please respond to the following question in one paragraph: When NOVA reconstructs the history of human migration from Africa, it is presenting an antiquated theory of how people arrived in the Americas.  Which model did they put forth?  What is the most recent theory and evidence?  Reference your work.

Using C1V1=C2V2

What is the chemical equation for main test and for the confirmation test?

M16.

my unknown # is 5.

The uses of thin layer chromatography are: 1) To identify unknown compounds 2) Determine purity of products 3) Analyze reaction mixtures 4) To waste time in lab 5) Determine the melting point of the product U 6) Put an astronaut on the moon.

asap please 1. Assume your analytical method requires a volume flow rate of 2.5 lpm. The required volume is 25 liters to 125 liters. Employees work four hours before lunch and four hours after lunch. What will be your sampling plan? Please explain fully.

19. What is thin layer chromatography (TLC) LEAST useful for from the list below? A) To determine if crystallization or distillation may be more effective for a separation B) To determine the number of components in a mixture C) To determine the appropriate solvent for column- chromatographic separation D) To monitor the progress of an organic synthesis reaction 14. The solubility of salicylic acid in water is 7.8g/100ml at 100°C and 0.25g/100ml at 25°. Estimate how much water is needed to recrystallize a 19g sample of salicylic acid? A) 150ml B) 250ml C) 300ml D) 400ml

The paper used in chromatography is made of molecules with___parts A polar  B nonpolar

in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working!!!!!!!

1.Toxicity Characteristic Leaching Procedure (TCLP) 2.Effect within minutes or days after exposure 3.Colorless gas used for the production of methanol 4. Mesothelioma 5. Combustion product that is associated with burning tire smell 6. Oral lethal dose in grams of a chemical with an LD50 of 1500 mg/kg for a 105 kg person 7. Effect several years after exposure 8. Product causes long-term chronic effects 9. Toxic pollutant that is associated with atmospheric haze 10. Federal drinking water standard for lead Match with the following answer .    a)157.5 g, b) Carbon monoxide c) Sulfur dioxide d) CPSC Toxicity Criteria e) Chrysotile f) RCRA Toxicity g) 15 µg/L h) Acute health effect i) 71.6 g j) Latent health effect k) Nitrogen oxide

Use a chemical dictionary, chemical text or encyclopedia to find a specific definition of "chromatography." List a few mobile and stationary phases.

Calculate the amount of BSA protein added to eachof the tubes

Table 1. Data on EDTA Standardization Weight of CaCO3 (g): 0.2003g Trial Volume of EDTA (mL) Molarity of EDTA (M) 1 8.60 2 8.50 8.55 Average Molarity of EDTA (M)