# mass = 9.9876±0.0004 g mass = 9.9866±0.0004 g mass = 9.9873±0.0004 g mass = 9.9878±0.0004 g...

 mass = 9.9876±0.0004 g mass = 9.9866±0.0004 g mass = 9.9873±0.0004 g mass = 9.9878±0.0004 g mass = 9.9864±0.0004 g

A student was calibrating a 10-mL pipette which was guaranteed by manufacturers to deliver 10.00 ± 0.02 mL if used correctly. He measured the mass of water delivered by the pipette five times and obtained the masses shown on the right. The mean mass is 9.98714 g.

a What is the absolute uncertainty associated with this mean mass? (use 1/2 range)

b He used a conversion factor (1 g = 1.0021 mL) to convert mass to volume.
What is the mean volume?  #### Earn Coin

Coins can be redeemed for fabulous gifts.

Similar Homework Help Questions
• ### (12 pts.) The principal investigator (PI) for the laboratory you are doing research in has tasked...

(12 pts.) The principal investigator (PI) for the laboratory you are doing research in has tasked with you to make 100 mL of an aqueous sodium phosphate (Na3PO4) solution with a formal concentration of 10.00 mM. Proceed through the following steps to quantify the concentration and uncertainty for the solution you produce. Note: for molar masses use the following values (Na = 22.98976928(2), P = 30.973762(2), O = 15.9994(4) g/mol) And propagate uncertainty for molar masses of compounds as standard...

• ### The principal investigator (PI) for the laboratory you are doing research in has tasked with you... The principal investigator (PI) for the laboratory you are doing research in has tasked with you with preparing 250 mL of an aqueous zinc sulfate (ZnSO4) solution with a concentration of approximately 50. mM- it is not critical for the solution to be exactly 50 mM, it is just critical to know what it exactly is. Proceed through the following steps to quantify the concentration and uncertainty for the solution you prepare. For this question use the following molar mass...

• ### Part C Iron has a density of 7.86 g/cm (1 cm = 1 mL). Calculate the... Part C Iron has a density of 7.86 g/cm (1 cm = 1 mL). Calculate the volume (in dL) of a piece of iron having a mass of 4.25 kg . Note that the density is provided in different units of volume and mass than the desired units of volume (dL) and the given units of mass (kg). You will need to express the density in kg/dL (1 cm = 1 mL) before calculating the volume for the piece of...

• ### Data Table 1 Mass of flask and oxalic acid (g) 117.43 Mass of empty flask (g)...

Data Table 1 Mass of flask and oxalic acid (g) 117.43 Mass of empty flask (g) 116.93 Mass of oxalic acid (g) 0.5 Moles of oxalic acid (mol) Final volume of NaOH (mL) 17 Initial volume of NaOH (mL) 5 Volume of NaOH used (mL) 12 Moles of NaOH (mol) Molarity of NaOH (M) Data Table 2 Mass of flask and vinegar (g) 126.61 Mass of empty flask (g) 121.63 Mass of vinegar (g) 4.98 Final volume of NaOH (mL)...

• ### 23.40245 What's the proper way to report (write) the reading shown in the analytical balance shown in t... 23.40245 What's the proper way to report (write) the reading shown in the analytical balance shown in the figure A) 23.402 B) 23.40245 C) 23.4025 D) 23.4 E) Any of the answers A-D are valid answers. How would you notate (write) the amount of fluid delivered from the "fill line" of the volumetric pipette shown in the figure, if the following markings are on the pipette: 25 mL +/- .02 mL TD at 25 C A) 25.00 mL B) 25.0...

• ### DATA Trial 1 Trial 2 Mass of Mg ribbon (g) TO SU 0.07839 (Proom) Barometric pressure... DATA Trial 1 Trial 2 Mass of Mg ribbon (g) TO SU 0.07839 (Proom) Barometric pressure (mmHg) 756 matte 756rrotta | 22.4°C Temperature of water inside beaker (C) 23.0°C 22.8°C Temperature of the room (°C) (T2) Pwater (mm Hg) Vapor pressure of water found in table at the end of the experiment, based on the temperature of water inside the beaker. 5 mm Hg Volume from graduated cylinder (mL) (V2) 60.2mL 82.4mL CALCULATIONS . Write the balanced chemical equation for...

• ### ignore the std uncertainty. I need help calculating the mass of Cu g from the concentraion... ignore the std uncertainty. I need help calculating the mass of Cu g from the concentraion of Cu mg/mL. use infromation provided STOCK CONCENTRATION: [Cu] = 0.2 mg culme CALIBRATION CURVE standard 2 סו STANDARD CU SOLUTIONS volume of stock used, mL [Cu] in standard, mg/mL absorbance standard 1 s. 0.004 0.240 0.008 0.421 standard 3 15 0.012 0.634 Prepare and include a graph of absorbance vs. [Cu] in mg/mL in the standard solutions. Do a lin- ear regresssion on...

• ### informations to solve the problem supooosed 3.109 g of sodium hydroxide was weighed out,dissolved, quantitively transferred...

informations to solve the problem supooosed 3.109 g of sodium hydroxide was weighed out,dissolved, quantitively transferred to a 250 ml volumetric flask, made up to the mark,and mixed well, what is the molarity of sodium hydroxide? the answer is 0.3109 M 1.a. Burets are used to transfer titrant in a titration. A burette is depicted in the lab manual. A 10.00 mL sample of vinegar was titrated with the sodium hydroxide sample from question 1. The initial volume of sodium...

• ### During the experiment he obtained the following data: Mass of Beaker = 48.936 g Mass of...

During the experiment he obtained the following data: Mass of Beaker = 48.936 g Mass of Beaker & methyl salicylate = 50.139 g Conc of NaOH sln = 4.0 M Volume of NaOH added = 10.0 mL Conc of HCl sln = 4.0 M Volume of HCl added = 18.0 mL Complete the following calculations based on this data: Mass of methyl salicylate used = ______ g methyl salicylate Moles of methyl salicylate used = ______ mol methyl salicylate Moles...

• ### question one question two Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine... question one question two Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...