Chen Lab 2

I want the names of the programs in which I can draw the method with the instrument like in the picture

Answer questions 1 and 2 according to the data given. Dater Weight of cream i: 326 kỳ. Table shows some data obtained directly from Lactascan instrument. Fat % SNF % Lacto- density 27.32 30.23 Raw milk 4.15 7.97 Skim milk 0.08 8.26 Q1. Calculate fat percent of creamn A) 46 B) 28 (C) 3D D) 0.046 آدرما 396 100 x Q2. Calculate efficiency of the cream separator. A) 100% B98% C) 97% D) 96% E) 87.2% amount 2500 L E) 0.28

You find that there is 500 mL D5W left in an IV infusion. The order is to infuse at 50 mL/hr. How long will it take to infuse the remaining fluid? Round to the nearest hour (whole number).

Jody, a medical assistant in a small clinic, ran out of surface disinfectant while cleaning thecounters in the clinic laboratory. The label of the disinfectant bottle she was using containedinstructions for preparing the surface disinfectant from the concentrated stock solution. Theinstructions read “Dilute the concentrate 1:50 with water.” Jody was using a disinfectant bottlewith a 500 mL capacity. 1. 1. Jody should prepare the replacement surface disinfectant by:a. Adding 1 mL of concentrate to 50 mL of waterb. Adding 10 mL of concentrate to 500 mL of waterc. Adding 10 mL of concentrate to 100 mL of waterd. Adding 10 mL of concentrate to 490 mL of water

1. The following data are from total and volatile solids tests on a wastewater. Calculate the total and volatile solids concentration in mg/L. Weight of empty dish = 68.942 g Weight of dish + dry solids = 69.053 g Weight of dish + ignited solids = 69.003 g Volume of wastewater sample = 100 mL

0.2 to 1.0 mg/ml: For each concentration, a volume of 1.0 mL should be prepared. How will you prepare these standards using micropipettes and which one would you use? There is a: 0,5-10 microliter pipette; 2-20 microliter pipette 20-200 microliter pipette 100-1000 microliter pipette.

A student was given a stock ascorbic acid solution of 2.323 mg/L. Following the directions in the lab, the student obtained the data below. Calculate the concentration of ascorbic acid in the Standard (in microgram/L, ug -). Report your answer with one place after the decimal. initial final initial volume final volume volume volume color reagent color reagent stock stock solution solution solution solution Standard 1.35 mL 6.64 mL 5.12 mL 9.32 mL

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Put some crushed ice in the 400 mL beaker. Allow some of the ice to melt then take the temperature. Record this as temperature of the ice. Temperature reading is 0.00°C Prepare accurately 20 % urea solution (2 grams urea in 8 grams distilled water). Place this solution in a hard glass test tube then place it in the beaker with crushed ice. Get the temperature of the urea solution at interval of 30 seconds. The temperature will go down until the freezing point is reached. Continue getting the temperature until 3 consecutive readings are identical. Record this as the freezing point of the solution. Temperature reading is -8.00°C. Make a general statement on the effect of solids upon the freezing point of liquid in which they are dissolved.

Current Attempt in Progress From the curves shown in Animated Figure and using the following Equation, determine the rate of recrystallization for pure copper at the several temperatures. Make a plot of In(rate) versus the reciprocal of temperature (in K-1). (a) Determine the activation energy for this recrystallization process. (See Section FACTORS THAT INFLUENCE DIFFUSION.) (b) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K). (a) i kJ/mol (b) i days

How to prepare the solutions listed below Solution 1) 25 mL 7 M sulfuric acid and the respective dilution of this solution to prepare 50 mL 2 M sulfuric acid in deionised water. Sulfuric acid Mw = 98.079 g mol-1 Sulfuric acid density = 1.84 g mL-1 Sulfuric acid purity = 98% Solution 2) 100 mL 0.02M potassium permanganate potassium permanganate Mw = 158.03 g mol-1 potassium permanganate purity = 99%

The volume of the solution that can be measured with 5-10 microliter pipette and 2-20 microliter pipette is 0.005-0.01 mL and 0.002 mL-0.02 mL. The volume of the solution that can be measured with 20-200 microliter is 0.02-0.2 mL. The volume 1 mL of solution is measured with 100-100 microliter which has capacity of 0.1 mL to 1 mL. What would the display read for 0.10 mL, 0.20mL, 0.40mL, 0.60 mL, 1.0 mL read when using the micropipettes mentioned above

what is the purpose of the water trap that is connected in the condenser in the set up shown below

Need detailed solution of abc if u don't know all parts please skip it

A student would like to prepare a 0.010 M solution from a 1.0 M stock solution with minimal error. The student can choose to do a one-step dilution that uses a 10 mL transfer pipet and a 1000 mL volumetric flask or a two-step dilution using a 50 mL pipet and a 1000 mL volumetric flask for the first dilution, and a 100 mL pipet and a 500 mL volumetric flask for the second dilution. Which method has the smallest overall relative uncertainty and what is the value? **Use table 4.2 on page 70 in your textbook for tolerances of the glassware. O One-step dilution; 0.0020 Two-step dilution; 0.0020 O Two-step dilution; 0.0014 O One-step dilution; 0.0010

Stamped by the manufacturer on a volumetric pipet is the notation, "TD 25 mL." Explain what this means.

For lab #3, Emily needs to pipette a 25.00 mL aliquot of lemonade into a 250 mL beaker. Place the steps below in the order that Emily would need to follow to correctly pipette the lemonade. < Holds the pipette vertical and drains the lemonade into the 250 mL beaker. Rinse the pipette 3 times with the lemonade. Pulls the lemonade up past the line on the pipette. Pours a small amount of the lemonade sample into a small beaker.