Lab 3 REPORT FORM Do You See the Light_F22

Please let me know which 2 answers are correct, an explanation including evidence

Safari File Edit View History Bookmarks Develop Window Help Not Secure - a5.chem.binghamton.edu o E LON-CAPA t30p04a O [엘소드/KR Elswrod] 범… MC Kimetsu no Yaiba - Di. As you work on the questions, have your lab manual and text book handy. If you have questions go to one of the office hours and remember, do not leave it for the last minute! In the titration of 25.00 mL of a water sample, it took 19.090 mL of 3.165x 10-3 M EDTA solution to reach the endpoint. Calculate the number of moles of EDTA required to titrate the water sample. (enter your answer with 3 significant figures) 6.04x10-5 You are correct. Your receipt no. is 151-9969 ? Previous Tries The total hardness is due to one or a combination of Ca2+, Mg2+, and Fe2+ in your sample. It is convenient to express this hardness as though it was entirely due to Ca2+. Making this assumption, determine the number of moles of Ca2+ present in the bottled water sample titrated. (enter your answer with 3 significant figures) 6.04x10-5 You are…

help  please answer 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!

Consider the following sets of replicate measurements: (1) Calculate the mean and standard deviation of Group A. (2) Determine the confidence interval at 95% confidence level. Assume the data here are the only knowledge you have and no previous measurements are available.

Assume the data below was collected for two different sample solutions using the same experimental procedure you carried out. Based on the two lines shown below, which solution (orange data points or blue data points) corresponds to the sample that would look DARKER in terms of how much light goes through the glass. 0.9 y= 4.7713x - 0.0728 R0.99953 0.8 0.7 0.6 0.5 0.4 0.3 0.2 y1.414x - 0.0546 R0.99642 0.1 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 0.1 [Concentration, M] orange data points (lower line) blue data points (upper line) Absorbance

Which of the statements below are TRUE regarding the mean and standard deviation? I.    As the number of measurements increases, x̄ approaches μ if there is no random error.II.    The square of the standard deviation is the average deviation.III.    The mean is the center of the Gaussian distribution.IV.    The standard deviation measures the width of the Gaussian distribution.

The following densities of water were obtained by Student A: 1.09g/mL, 1.14g/mL, and 1.15g/mL.Determine the average and standard deviation of the density.

Listed in the Item Bank are key terms and expressions, each of which is associated with one of the columns. Drag and drop each item into the correct column. Order does not matter. Terms Extrinsic properties (also called extensive) are directly related to the amount of material being measured. Intrinsic properties (also called intensive) are those which are independent of the amount of matter present. Intensive :: Melting point :: Density :: Length :: Boiling point Privacy PHONE 1-877-377-9537| FAX 1-877-816-0808 Blog hp :: Mass :: Volume 7 of 8 Extensive 01:01:37 :: Luster :: Color :: Temperature Ne

Your Question :help  please answer 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!

Level = 6ft of water (h20 density = 0.036 Ib/in^3) Find gauge reading in psi = Find gauge reading psig = Find gauge reading in psia =

Provided are spectra for a compound with molecular formula CgH100 Part A) Give the degrees of unsaturation Part B) Identify the peaks that are associated with specific bonds of the structure and list the corresponding functional groups that the specific bonds belong to. Re- create the example table below that organizes this information. Use the wavenumbers that are already labeled on the spectra. Example table: wavenumber (cm-1) Corresponding Bond Type Corresponding Functional Group C(sp3)-H N-H 2978 3300 Part C) Draw the structure and clearly indicate which hydrogens correspond to which signals in the HNMR spectrum ONLY. The signals are already labeled A-D on the HNMR spectrum. Match the hydrogen labeling (HA, HB, etc.) on your drawn structure to the signal labeling provided. 4300 3320-2872 2951 3006 3003 2001 alkyl amine 1613 1510 1000

Geddy and Neil are measuring the melting point of their starting material prior to their lab experiment: despite analyzing the exact same sample from the same jar, they both measured rather different values, with one measuring a melting point of 141.3-153.6°C and the other measuring a melting point of 143.4–144.9°C. Propose a reason explaining the discrepancy.

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Choose the one correct or one incorrect statement regarding filtration:      gravity filtration uses a Buchner funnel, filtering flask and negative pressure      filter paper should be wet with solvent to seal it to the funnel before filtering      the solution collected in the filtering flask is called the residue      vacuum filtration is most often used to remove impurities from a solution      the solution to be filtered should completely fill the top of a Buchner funnel

The scientific methods is applied to natural phenomena. What is natural phenomena? Give two examples of natural phenomena and two examples that are not natural phenomena.

Individually weigh each of the nine nickels used in part 2b. Then calculate the average,average deviation, and standard deviation of the nine samples. The mass of a U. S. nickel,when minted, is 5.000 g. What is the percent error between your average and the U. S. Mintvalue? Pay close attention to your significant figures when doing these calculations.   Sample Mass (g)                                                         Average Mass ____________ gNo.1 _5.029 ______                         Average Deviation ____________ g2 _5.010 ______                          Standard Deviation ____________ g3 _4.983 ______                            Percent Error ____________ %4 _5.036 ______5 _4.989 ______6 _5.026 ______7 _5.028 ______8 _4.980 ______9 _4.952 ______   im having issues with average deviation and standard deviation

The gold content of an ore is being measured. The results of these analyses are:  Content (ppt) 20.065 19.999 21.054 20.533 20.088 20.112 What is the average value, standard deviation and confidence interval for this set of data?Show each step of the calculation. Using your results calculate the %accuracy and %precision (relative standard deviation) if the true value is 20.045%.

A sample was placed on a chromatography column. Methylene chloride was used as the eluting solvent. No separation of the components in the sample was observed. What must have been happening during this experiment? How would you change the experiment to overcome this problem?

How is scientific writing different from the style of writing that you learned in ENG 111?  (Select all that are correct.)   Group of answer choices a. Scientific writing is concise, written in 3rd person, and uses past tense. b. Science writing uses lots of colorful language to describe visual reactions to the experiment. c. Science writing uses lots of personal pronouns (e.g., I, me, we, you, your, our) to show ownership of the results and personal attention to directions. d.Science writing assumes the reader already knows how to do the experiment that is the subject of your paper. e.Science writing may include references that are from peer reviewed sources.

Part C Say you glued two samples together; a 5.00 g sample of acrylic with a density of 1.19 g/mL and a 2.35 g sample of Teflon (d = 2.22 g/mL). What is the density of the combined sample? Be careful here and remember the difference between intensive and extensive properties. • View Available Hint(s) ? 1.29 g/mL