A Moving to another question will save this response. Question 21 If n = 2, what value cannot mĮ have? explain your reason in a separate sheet. O ml =+1 %3D O ml = -2 O ml = -1 O ml = 0 A Moving to another question will save this response. 257 44.823 APR 23
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- Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius of 0.143 nm. The masses of a proton, electron, and neutron are 1.67261024g,9.10941028g, and 1.67491024g, respectively. The volume of a sphere is 4r3/3, where r is its radius. Express the answer in grams per cubic centimeter. The density of aluminum is found experimentally to be 2.70 g/cm3. What does that suggest about the packing of aluminum atoms in the metal?Scenario In an investigation, lab groups combine two compounds, as shown below. Based on the data collected from all lab groups, you realize that one group’s data was not possible. Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g) External Data Group Number Mass of Mg (g) Mass of HCl (g) Mass of MgCl2 (g) 1 5 15 20 2 5 15 17 3 5 15 21 4 5 15 20 5 5 15 19 Prompt Make a claim about which group’s data is not possible. Use evidence and scientific reasoning to support your claim. Include a rebuttal in your answer. Claim (1 sentence): ______________________________________________________________. Evidence 1 (2-3 sentences):…Consider the table. Metal Tm (K) ΔHfus (kJ/mol) Tb (K) ΔHvap (kJ/mol) LiLi 454 2.99 1615 134.7 NaNa 371 2.60 1156 89.6 KK 336 2.33 1033 77.1 RbRb 312 2.34 956 69 CsCs 302 2.10 942 66 Using the data, calculate Δ?fusΔSfus and Δ?vapΔSvap for Cs.Cs. Δ?vap=ΔSvap= JK⋅molJK⋅mol Δ?fus=ΔSfus= JK⋅molJK⋅mol
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- Probably meant in the calculation that 20*10K+20=0.6, but how did you get that to be 20=6K+12?Mass of the gelatin capsule was: 0.1134 g Mass of the capsule and the allow sample was: 0.3218 g Ambient Temperature was: 23°C Mass of empty beaker: 154.3 g Mass of beaker with water: 401.6 g Vapor pressure of water for this data: 21.1 mmHg Atmospheric Pressure: 732 mmHg Assume density of water to be 1.0000 g/mL What is the volume of the displaced water in Liters? Using PH2V= nH2RT, nH2=PH2V/RT how many moles of H2 were evolved? Determine the number of moles of H2 per gram of sample. Determine the %Al using NH2= (%AL/100 * 0.0556) + (100-%AL/100 * 0.0153)During a titration experiment, 50.00 mL of a certain solution needs to be transferred to an Erlenmeyer flask. To measure the volume, a student used a calibrated 10-mL pipette five times. If the pipette delivers an actual volume of 9.98 mL with an uncertainty of ±0.02 mL, what will be the uncertainty in the final volume?
- 21,1) What percentage of 145X (t1/2 = 768.7 h) would remain after 505.4 hours. Use the formula with 0.693 instead of ln 2. The data for element X does not exist. All numbers are hypotheticalA loss of 0.35 mg of Zn occurs in the course of analysis to determine the element. Calculate the percent relative error due to this loss if the masses of Zn in the replicate samples are the ff: (a) 40.0 mg (b) 400.0 mg (c) 175.0 mg (d) 600.0 mg.1.state the process determining the volume of irregular object 2.In determining the density of an irregular stone of a mass 80g.The stone was dip in a measuring cylinder fill with water and gave a find reading of 100cm3 after the experiment. The density of a stone was 2g/cm2.Find the initial reading of the measuring cylinder. 3.A solid of mass 450kg has a volume of 20cm3 calculate the relate density of solid. Density of water:100pkg/m3 changes in cm