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- What is a 99% confidence interval uncertainty of the slope when we are given a trendline with a slope of 42.211 and an R² value of 0.9991 for a set of 145 data points?Step 3: Each successive approximation uses the value from the previous approximation. 7.90 x 10-5 = x3(0.100 + x, Calculate the third approximation of x. Step 4: Continue this process until two x values agree within the desired level of precision. Calculate the fourth and fifth approximations of x. X4 = Which values are the first to agree to two significant figures? O x2 and x3 X1 and x3 x4 and xs O xy and x4 Which values are the first to agree to three significant figures? O x2 and xy O xi and x2 Xy and x4 X4 and xsTime required to elute substance Z when N = 1000 = when N = 2000 The two quantities cannot be compared due to insufficient information. when N = 1000 > when N = 2000 %3D when N = 1000 < when N = 2000
- a) To prepare 250mL of 0.100 M H2SO4, a student uses graduated pipette and a 250mL volumetric flask having uncertainty of ±0.02mL and ±0.1mL respectively. Calculate the volume of concentrated sulfuric acid 96% (±3) used and the uncertainty in 0.100M. dH2SO4 96 % = 1.84 (±0.05) g/mL FMH2SO4 = 98.079 g/mol b) If you want to prepare 1.00 L of buffer at pH 7.54 with a total phosphate concentration of 0.500 M, how many grams of each selected compounds below would you mix? Given that: H3PO4 (FM 98.00), NaH2PO4 (FM 119.98), Na2HPO4 (FM 141.96), and Na3PO4 (FM 163.94)? Ka1 = 7.1 x 10-3; Ka2 = 6.3 x 10-8; Ka3 = 4.5 x 10-13Example 2: You prepared a 0.250 M NH3 solution by diluting 8.45 (±0.04) mL of 28.0 (±0.5) wt% NH3 [density = 0.899 (±0.003) g/mL] up to 500.0 (±0.2) mL. Find the uncertainty in 0.250 M. The molecular mass of NH3, 17.0306 g/mol, has negligible uncertainty relative to other uncertainties in this problem. %3DWhich expression is correct? O All of them are correct O 1/v = Vmax/Km 1/[S] + 1/Vmax O Km = k2/k1+k.1 %3D O V= Vmax[S]/(Km+[S]) %3D
- Q1/ calculate the precision in confidence level 63% and 95% from these results (Arrange your answer in the same table) Element S (5) P 63% P 95% precision ppm Zn 74 83 83 Cu 27 24 24 Co 27 29 29 Ni 130 130 130 Pb 354 365 365 Cr 100 106 106 Sr 378 393 417 Mn 227 510 510 !!(d) 99 253 Es +He 101 Md + ? 246 Cm +°C → 5 ,n+ ? 13 (f) 249 Cf + ? → 260 Db + 4 on 98 105I just need to know if these are all correct and I need help with just the blank ones.
- The photo fixer requires 1 quart of Part B to each 2 ½-galIon cube container of PartA chemistry. What is the ratio of Part A to Part B?(8) Identify whether the following are examples of systematic or random error or are mistakes: a. Using an inaccurately calibrated buret. b. An uncertainty of 1 mg in the weight of your sample.∓ c. Overshooting the endpoint on your first sample, then hitting the endpoint on the remaining samples.d. Failing to let your volumetric pipet drain for a few seconds have most of the liquid has been delivered.Times New. 10 -A A Aa | A m。M.一MH 一 24| T 明叫山国一=。一险<田。 AaBbCcDdE AaBbCcDdE AaBbCcD AaBbCcD. B IUv ab X X 2- A v Normal No Spacing Heading 1 Styles Pane Title Dictate Sensitivity Cr 1. The diameter of a neutral Helium atom is about 1 x 102 pm. Suppose we could line up Helium atoms side by side in contact with one another. Approximately, how many atoms would it take to make the distance from end to end 1 cm? 2. What is the mass number of an iron atom that has 28 neutrons? 3. Determine the number of protons and neutrons in the nucleus of : a) He z=2 A=3 b) He z=2 A=4 c) Mg z= 12 A= 24 d) Mg z=12 A=25 e) Ti z= 22 A=48 f) Br Z= 35 A = 79 Write the annronriate evmbol for each of the followwing: 252 words O Focus English (United States) Page 1 of 2 MacBook Air
