A group of students were trying to experimentally determine the density of an unknown liquid. They developed a standard technique for measuring density by recording the mass of a liquid using an analytical balance. The volume of the liquids were accurately measured using a serological pipette and was recorded to be 5.00 mL for each trial. The students were able to collect the following data: LIQUID SAMPLE Hexane Acetone. Ethanol unknown Trial 1 (mass in grams) 3.281 3.921 3.912 3.914 Trial 2 (mass in grams) 3.284 3.923 3.911 3.911 What is the percent error of the density for ethanol? Trial 3 (mass in grams) 3.279 3.947 3.913 3.910 Theoretical Density 0.655 g/mL 0.784 g/ml 0.789 g/ml

A group of students were trying to experimentally determine the density of an unknown liquid. They developed a standard technique for measuring density by recording the mass of a liquid using an analytical balance. The volume of the liquids were accurately measured using a serological pipette and was recorded to be 5.00 mL for each trial. The students were able to collect the following data: LIQUID SAMPLE Hexane Acetone. Ethanol unknown Trial 1 (mass in grams) 3.281 3.921 3.912 3.914 Trial 2 (mass in grams) 3.284 3.923 3.911 3.911 What is the percent error of the density for ethanol? Trial 3 (mass in grams) 3.279 3.947 3.913 3.910 Theoretical Density 0.655 g/mL 0.784 g/ml 0.789 g/ml

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Chemistry Question
A student estimated that the volume of a crucible was 28.6 mL. When the volume was accurately measured, the volume was 34.5 mL. What was the percent error for this estimate? % error=[accepted value-experimental value] accepted value (100)
A chemist prepares a solution of sodium chloride (NaCl) by measuring out 4.66 g of sodium chloride into a 50. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium chloride solution. Round your answer to 2 significant digits. ||molL x10 Explanation Check O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility 80 F Cloudy DELL Delete PgUp PrtScr Insert F11 F12 F9 F10 F7 F8 F5 F6 Nus F3 F4 Esc F1 F2 Backspace & $
PART 3: Table title: unknown salt solution density by graphical method Mass of empty graduated cylinder: 24.110g Volume Mass of TRIAL 1 2 3 4 9.2 21.9 26.9 30.0 gr.cylinder and solution 33.144 48.628 54.618 58.777 True density of solution: Mass of solution 9.224 26.728 27.718 28.777
3 questions... Need in correct number of significant figures.
Convert a speed of 253 mi/h253 mi/h to units of feet per minute. Also, show the unit analysis by dragging components into the unit‑factor slots. 253 mi1 h×()×()253 mi1 h×()×()
Tubes 1-4 are standards with known mass and known volume of 200µL. Tubes 5-7 are unknowns that have been diluted 1/100 and volume used 200μL. How do you work out the concentration of tubes in g/L using a standard curve to work out the initial mass of unknowns. Tube No. 1 2 3 4 5 6 7 Protein amount (ug) 0 50 100 200 Absorbanc e (750nm) 0 0.32 0.5005 0.824 0.612 0.805 0.69
||| = O MEASUREMENT Setting up a unit conversion A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. 0.040 Explanation kg mi km).- Check g cm 0 x10 0.0 x 3. μ Olo 5 evemeGraw Hill L
drc%3D0&gi%3D24758088cfql=18dnb-D081 What is the volume in liters that is needed to create a 2.3 M solution with 4.0 moles of Fe(OH)2? Round your answer to 1 decimal. Your Answer: Answer units D Add attachments to support your work
Q1. Amylum, commonly known as starch is a white powder with variable molecular formula due to the different number of repeating sugar units based on the plant that it is obtained from. A sample of amylum in the form of spherical beads was subjected to series of analyses to determine physicochemical properties in the quality control unit of a factory. From the results each bead is found to have a 4.5 mL volume and 1.47 g/mL density. 4 of the beads were placed in a reaction chamber combusted, as a result, 43.1 g CO2 and 14.7 g H2O were obtained. If the molecular weight of the amylum is 972.84 g/mol how many repeating units the starch molecule consist and what is the molecular formula of the starch? [Empirical Formula=CxHyOz, Repeating unit=n, Molecular Formula=( CxHyOz)*n= CnxHnyOnzl
Part B (Trial #1) Part C (Trial #2) Mass of empty evaporation dish 154.48 g 158.34 g Volume of sodium chloride solution added to evaporation dish 10.0 mL 10.0 mL Mass of evaporation dish containing sodium chloride crystals after evaporating the water and drying 154.94 g 159.85 g Determine the average mass/volume % of salt in water.
Please explain the steps and the formula being used.