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Describe three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid.
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- rosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 7 pieces of 0.97 cm diameter and 1.14 cm height cylindrical beads is determined to be 1.63 g/mL. These beads were then placed in a flask and was filled to the 40 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 46.86 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 32%. Assuming that the solution was able to fully fill the empty spaces inside the beads, calculate the density of the salt solution. Show your solutions in the next item Round your answer to 2 decimal places. Question Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 7 pieces of 0.97 cm diameter…A student wanted to determine the moisture content of a solid sample using gravimetric methods following the AOAC 930.15 method. The following data were obtained: mass of crucible (container): 24.6743 g initial mass of crucible and sample: 34.2134 g final mass of crucible and sample: 32.0567 g Calculate the %moisture of this sample. Show your entire solving process. You may upload a photo of your solution or you may just type it in.Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 7 pieces of 0.97 cm diameter and 1.14 cm height cylindrical beads is determined to be 1.63 g/mL. These beads were then placed in a flask and was filled to the 40 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 46.86 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 32%. Assuming that the solution was able to fully fill the empty spaces inside the beads, calculate the density of the salt solution. Show your solutions in the next item Round your answer to 2 decimal places.
- You are checking the accuracy of a volumetric flask marked 10.00 mL. To Measurement Volume (mL) calculate the volume of water contained in the flask, you first measure the mass 1 10.047 of the empty flask and the mass of the flask filled with water and take the 10.052 difference. Then, you correct for the buoyancy factor and divide by the density of 3 10.022 the water. The result of 8 such measurements is given in the table. 4 10.047 Calculate the mean and the 95% confidence interval for these measurements. 5 10.024 10.016 7 10.065 8 10.024 mean: mL 95% confidence interval: + mL Can you, with 95% confidence, say that the nominal value of 10.00 mL can be the true volume of the flask? no yesPorosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 13 pieces of 0.6 cm diameter and 0.67 cm height cylindrical beads is determined to be 1.53 g/mL. These beads were then placed in a flask and was filled to the 42 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 51.68 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 21%. Assuming that the solution was able to fully fill the empty spaces inside the beads, calculate the density of the salt solution. Show your solutions in the next item Round your answer to 2 decimal places. Add your answerWhat volume of iron (density 7.87 g/cm3) would be required to balance a 2.80 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?
- QUESTION 16 Match the correct choices with the given. For gravimetric analysis, use this data to answer the questions. |Trial 1 0.6020 g 24.8405 g 24.8451 g 24.8422 Trial 2 0.5021 g 22.8165 g 22.8165 g Trial 3 0.5018 g 22.8169 g 22.8169 g |Weight of Sample Weight of Crucible and Ba$O, 8 24.8422 g Constant Weight of Crucible & Sample 24.8422 g 22.8165 g 22.8169 g Weight of Crucible 24.3181 22.3593 g 22.3641 g 24.3160 g 24.3142 g 24.3142 g 24.3142 g 24.3142 g 22.3523 g 22.3534 g 22.3532 g 22.3532 g 22.3612 g 22.3605 g 22.3605 g 22.3605 g Constant Weight of Crucible 22.3532 g 22.3605 g Weight of BaSo, |% so,2- Average Standard deviation Relative standard deviation A. 2.65 Average of the % (w/w) SO42- B. to decompose the solid and form a compound of known composition and to remove the solvent and any non-volatile species Standard deviation of the % (w/w) So2- Relative standard deviation of the C. reprecipitation % (w/w) SO42- D. formation of small crystals This is a drastic but effective…In a gravimetric determination of lead content in brass, there is a constant loss by solubility of 1.55 mg of lead. A sample contains 7.86% by mass lead, and a 0.3514-g sample is used for the analytical determination using the gravimetric method. Calculate the % relative error. *Watch the units. **Provide your answer to two decimal places and without units. Avoid using scientific notation.Specific protocol should be followed any time a balance is used to weigh the mass of a chemical or object. Select which rule(s) are part of this protocol. All of these rules are part of the protocol. Glassware, containers, and chemicals should be at room temperature. The same balance should be used throughout an experiment. Glassware must be dried thoroughly before being weighed and all chemicals should be contained in either a piece of glassware or weighboat. All chemicals should be contained in either a piece of glassware or weighboat. Filter paper must be completely dry, even after being used in an experiment. Glassware must be dried thoroughly before being weighed.
- Referring to your best straight line graph, what are the units of the slope?What physical property of steel is the slope of this line related to? Use the graphed data and your best trendline equation to predict the diameters of the three unknown ball bearings.Show your calculations below and report your three results in the data table above with 2 decimal place accuracy. ] 7. How could we improve the accuracy of the largest unknown ball bearing's diameter prediction? can you help me answer all this questions please, ai really appreciated it.II. STANDARDIZATION OF NAOH SOLUTION Table 3.4. Standardization of NaOH solution. Trial 1 Conditions Trial 2 Primary standard Weight of flask, g Weight of flask + KHP, g Weight of KHP,g NaOH solution Final volume reading, mL Initial volume reading, mL 123.4568 122.4567 123.7072 122.7208 25.50 32.40 0.00 5.50 Volume used, mL Normality of NaOH solutionYou try your best to put your samples in the middle of the balance pan when you try to weigh them every time. However, you know that it is impossible to place your samples in the same location each time. This discrepancy introduces error to your measurements. systematic random