Select Select %D to Draw I to Draw I 1. Hg(0 Ac)2, H20 1. BH3- THF 2. H2O2, 2. NaOH NABH4, KMNO4, H2SO4 NaOH H20 cold Select Select to Draw to Draw

How can we identify whether the compounds are ionic or covalent for part 1?

2) What is the relative error in delivering a volume of 18.28 mL from a class A 25 mL buret? (Remember, burets require two readings to deliver a certain volume, pipets only require one reading!) NIST Tolerances for Volumetric Glassware, Class Aa Tolerances (mL) Capacity (mL) (Less Than and Including) Volumetric Flasks Transfer Pipets Burets 1000 +0.30 500 ±0.15 100 +0.08 ±0.08 +0.10 50 ±0.05 +0.05 +0.05 25 +0.03 +0.03 +0.03 10 +0.02 +0.02 +0.02 5 +0.02 +0.01 +0.01 2 +0.006 "Corning Pyrex glassware and Kimball KIMAX, Class A, conform to these tolerances.

25 Choose the letter of the correct answer.

How is light and energy used in gas chromatography- mass spectrometry (GC-MS)?

Calculate the standard deviation of the four trials below.  Trial 1: 49.59 grams Trial 2: 51.25 grams Trial 3: 49.78 grams Trial 4: 50.19 grams

To determine the amount of copper and the identity of the copper compound in the unknown sample, a 100-mL solution containing 120.8 mg of the sample was initially prepared. Then, 5.00 mL of this solution was pipetted and diluted with deionized water in another 100-mL volumetric flask. The absorbance of this diluted solution was determined three times at the analytical wavelength. The data is in the table below.    Unknown sample Trial 1 Trial 2 Trial 3 Absorbance (AU) 0.388 0.389 0.388 What is the concentration of Cu in analyzed solution (mg/L) for each trial?

Utilize the structure of Benadryl (Diphenhydramine) shown below to determine its molecular formula. OA.C17H21NO OB. C15H23NO C.C17H23NO OD. C17H11 NO N_

Please choose an appropriate technique(s) to separate following compounds (it can be one, more than one, on none): Compound Melting Point Density Boiling Point Molar mass Phenol 40.5°C 1.07 g/cm 181.7°C 94.113 g/mol Toluene -95 °C 0.87 g/mL 111 °C 92.141 g/mol Simple Filtration Column Chromatography Distilation Crystallization/Re-Crystallization Separatory funnel None www. MacBook Air

The TLC and mp data contradict one another with regards to purity. True False