.Which cube would heat up the fastest? .Which cube would remain warm the longest?. .Why is an advantage for polar bears to be large? . Why is being large a disadvantage for African elephants? .Why do African elephants have large, flat ears?
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- You are given a 27 % (w/v) solution of psicose. Molar mass: psicose (C6H12O6) = 180.156 g/mol. ou have a 0.75 mg/mL solution of bovine serum albumin (BSA). You add 1 mL of the 0.75 mg/mL BSA solution into a standard cuvette (1 cm path length), set your spectrophotometer to 280 nm and read the absorbance of this BSA solution. Molecular mass of bovine serum albumin = 66.4 kDa. Molar extinction coefficient (e) of BSA = 43824 M-1 cm-1 (at 280 nm). What absorbance reading will you obtain?What is v/Vmax ratio when [S] = 4km? %3D21 500 Density O x Safari - Jan 20, 20. X Untitle Density ConversionVo. x UnitConversionSE.. x MeasuringVolume. A. What is the starting volume of water in the graduated cylinder? B. Place the apple into the cylinder. What is the volume in the cylinder how? The water rises in the cylinder because it is displaced, or pushed upward, by the apple. The amount of displaced water is equal to the volume of the apple. C. What is the volume of the apple? (Use the Object volume to check.) Note: Milliliters (mL) are used for liquid volumes, while cubic centimeters (cm") are used for solids. One mL is the same volume as one cm". The apple's volume is measured in cm". Get the Gizmo ready: Activity A: • Replace all objects on the shelf. • Be sure the liquid in the beaker is Water. Sink or float? Question: How do mass and volume affect sinking and floating? 1. Predict: Which objects do you think will float in water? Which do you think will sink? Record your predictions below in the first column of the…
- Solution Absorbance mg/ml aspirin Standard solution - 1.6 mg/mL A 0.638 0.08 mg/mL B 0.504 0.064 mg/mL C 0.376 0.048 mg/mL D 0.259 0.032 mg/mL E 0.126 0.016 mg/mL A = -log T where T = %T ÷ 100 Construct a callibration curve using the above data. Absorbance should be on the vertical axis and "mg/mL of acetylsalicylic acid" on the horizontal axis. The line should go through the origin. Using the data provided, the graph you have generated, and the procedure that was used to generate the solutions which were examined by spectroscopy, calculate the amount of acetylsalicylic acid per tablet. Commercial tablet 1 labelled as 100 mg enteric coated Absorbance = 0.16 Commercial tablet 2 labelled as 300 mg Absorbance = 0.45 Student prepared tablet from practical 5 Absorbance = 0.19 Using the data provided, the graph you have generated, and the procedure that was used…correct answer should be 20.6 but how?A KCC student titrated 100.00 mL of a NaOH solution using 55.00 mL of a 0.1000M H2SO4 solution. How many moles of acid were used ? This is part 1 of a titration problem H2SO4 + 2 NAOH Na2SO4 + 2 H20 O A. 0.0055 mol B. 0.0100 mol O C. 0.100 mol D. 0.550 mol O E. 5.50 mol
- 275B/s l 29% M 1:27 PM Q2 LT1 classroom.google.com JDR Open with ONYX Q2 LT1 Learning Task 1: Study the letter-maze below. Look for the six parts of the microscope hidden on the letter-maze. Write your answers in your answer sheet. E Y E P E E L DLLS R L. A w A E R L M sE E RE R E F U L. в E т F A R м J D Y TU G O T B D в E A C x K P EI VLIK ET D A м E T E L O A NO B N A т E A T P. o M E N L н A A E к R L R R A E G T L. V в т R т L E A E M E o T A J E к м M T T R R L E E N I N Y E F A Y N G N A R A N T N Mark as done Q + OBSA Concentration (ug/mL) Abs 2000 2.25 1500 1.715 1000 0.915 750 1.156 500 0.714 250 0.082 125 0.086 25 0.082 Create a BSA standard curve Abs562=f[BSA] using a Scatter Plot representation in Excel.The volume is need to prepare 100 ml of 0.1 N form HCI is ------ml, if you know sp.gravity =1.18 and * ? containing about 37% HCI 11.8 O 8.4 O 0.84 O 1.18 O
- You just made a 1.5M permanganate solution. What concentration is your potassium permanganate solution in percent? "K: 39.10 g/mole" "Mn: 54.94 g/mole" "O: 16 g/mole" "MW of KMnO4 is 158.04 g/mole" O a. 0.24% Ob. 20.1% O c. 15.8% O d. 23.7% O e. 2%Determine the % inaccuracy by calculating the percent error of the micropipette at the set volume of 100 µL A. Standard deviation B. Covieffecrnt of varaiant C. % error (precision) Percent error = mean volume delivered -expected volume x 100 Expected volume RUN Weight Measurement (in g) 1 0.0985 2 0.0987 3 0.0985 4 0.0982 5 0.0984 6 0.0984 7 0.0981 8 0.0983 9 0.0982 10 0.0988 Total 0.9841 A. Standard deviation B. Covieffecrnt of varaiant C. % error (precision)Time Absorbance Concentration 60 0.223 0.0130 180 0.198 0.0115 300 0.206 0.0120 480 0.171 0.0099 660 0.13 0.0076 900 0.122 0.0071 1200 0.09 0.0052 1500 0.107 0.0062 2100 0.046 0.0027 ε is the molar extinction coefficient (17.2 M-1 cm-1), b is the pathlength (1 cm) Slope of the most linear graph: y = -0.0007x - 4.2935 Find the rate constant for this reaction using slope of the linear graph with brief steps.