9-TestOfHypothesis-Exercise-1

Part 1) what is average density of water samples. ( 1 g/ml)  Part 2) what is percent error.

For each of the following equilibria, write the equilibrium constant expression for Ke Y Part A 2N₂Os (9) 4NO₂(g) + O₂(g) O Ke = O K₂= O K. OK- Submit Part B [NO₂[0₂] N₂O₁ Ke = [NO₂¹0₂] N₂0₂ N₂O₁] NO₂0₁ N₂O, NO₂] O₂ Request Answer 3F2(g) + Cl₂ (9) 2CIFs (9) (CIF₂ CI, P ICE, P Pearson

Perform the calculation below (Equation 1) to the correct number of significant figures? (Show your work.) (??.????−?.???) divided by ?.? =? Equation 1

Weight of coin 1 (g) 11.4286 Weight of coin 2 (g) 11.4633 Weight of coin 3 (g) 11.4632 Weight of coin 4 (g) 11.5468 Weight of coin 5 (g) 11.5691 Mean (g) 11.4942 SD 0.0604068290841 %RSD 0.53% Check for suspicious outliers by using the Grubb’s test.

1. A student wanted to find the density of an object of unknown composition with a volume of 5.50 0.05 cm³. The mass of the object was 19.255 0.005 g. What is the density of the object, including the absolute uncertainty? a. 3.500 ± 0.3 g cm³ b. 3.500 ± 0.03 g cm? c. 4.259 ± 0,6 g cm¹ d. 4,259 ± 0,06 g cm³

Question 23 Not yet answered Marked out of 1.00 P Flag question 17NEW June 20 2019. Analysis of several plant food preparations for the content of organics yielded the following data: 16.40, 16.36, 16.26 and 16.34%. The true value is 18.50%. The results of this analysis are, Select one: a. Inaccurate but Precise b. Accurate and precise c. Accurate and imprecise d. Inaccurate and imprecise Question 24 Not yet answered Marked out of 1.00

Sonya is working in the lab. She measures an initial 10 g of Silicon into a beaker weighing 27 grams. After Sonya performs her experiment she reweighs the beaker with the silicon and records a mass of 39.5 grams. Calculate the percent yield of silicon. e here to search Home End F5 F8 F9 F11 F12 Insert %23 & 3 4 7 8 W R Y S. J K {N Alt Alt PrtSc Ctrl + I| この * 00

Course name: College Chemistry You need to solve this problem based on Problem, Data, Hypothesis Experiment, and conclusion. Please do not use Chat GPT to solve this problem. Scientific methods Instruction: Clearly provide the statement for each step of the scientific method in 1 sentence: 1. 2. 4. Problem 3. Hypothesis Experiment Conclusion 5. Data Course code: CHEM 141 SCENARIO 5: Study Habits and Test Performance A group of students in a class notice that their test scores vary, even though they study similar amounts. They want to determine if different study habits affect test performance. The students note down the study hours of each student and their corresponding test scores. They also survey students about their study methods, such as reading notes, practicing problems, or group study. The students speculate that students who engage in active study methods, such as practicing problems, will perform better on tests compared to those who passively review notes. They begin by…

Match column A (tests) to column B (positive results) and column C (substance) in answering, Use CAPITAL LETTERS for column B and small letters for Column C. Separate each anser with one(1) space not comma(,). If there are more than one answer for each column then write possible answers Ex. 1. B c 2. B c e

schoolwork fanficwriting youtubestuff Pt Periodi x O (13) Em x A R Chem x b Ask a 0 x O Calcula x O (14) Ca x Bb ChemicX G 31.998 x + A cl.castlelearning.com/Review/CLO/Student/Assignment/Questions?assignmentID=8891573&tid=2517355 R Chem Chem Math Quiz 2 Madison Clark : 1573 1) Listen Given the balanced equation representing a reaction: C3H8(g) + 502(g) → 3CO2(g) + 4H20(g) What is the total number of moles of O2(g) required for the complete combustion of 1.5 moles of C3H8(g)? 1. 0.30 mol 2. 1.5 mol 4.5 mol 4. 7.5 mol Submit Answer Hide Toolbar EX Zoom: Standard Note Bookmark Eliminator Highlighter Calculator Ruler Protractor Line Reader Reference Coming soon O v i 7:08

2.A student is trying to determine the volume of a flask and compare it to the known volume. After performing the measurements 10 times, the student calculates an RSD of 2 ppt, with a percent error of 24%. Which of the following statements about the results are correct?   A. The line fits the points on the calibration curve well.   B. The results are precise and accurate.   C. The results are accurate, but not precise.   D. The results are precise, but not accurate.   E The results are neither accurate nor precise.

1

Standard deviation of the measurements in the picture

13. Which of the following lot differences is acceptable if a 20% difference is acceptable? a. old lot value = 42, new lot value = 50 b. old lot value 387, new lot value = 306 C. old lot value = 17, new lot value = 10 %3D %3! %3D !!

7. A procedure for measuring the amount of creatinine in blood was applied to a standard blood sample and the following results were produced: 0.787, 0.812, 0.796, 0.739, 0.802, and 0.823 mg/dL.  a) Can any of the data points be rejected by the Grubbs test? b) What is the 95% confidence interval for the data?

Please don't provide handwritten solution ...

2. The following eight structures are all isomers of C6H14O. Each structure corresponds to one of the predicted ¹H NMR spectra pictured on the next two pages of this document. The integral values for each peak are next to that peak. Indicate which structure matches each spectrum by drawing the structures in the boxes along the right side of the pages. Use the letter codes provided to label the chemically equivalent hydrogens on the structures. One example is provided. Xor A 2H 1H <- A 4H -3₂₂ OH B 2H tot 2 PPM PPM -N 2 PPM N- -~ B 12H DE C 2H 2H 1H B 4H 6H ха по мон F 6H B B B w

li! See Periodic Table A student calculates a mean concentration of 0.14522 M with a standard deviation of 0.012 M. How should you properly report the mean concentration? M

? 1. 03 2. DMS Br₂, DCM KMnO4, Hot ? X2

Q/Choose the correct answer

6 A5.301 g of sample of a mixture containing MgSO, 7H,O (MM-246.5) and NaCI (MM-58.44) yielded 3.784 g a solid residue after this mixture was heated. Given this information, how many grams of sodium are in the mixture? Report the answer to 3 significant figures. Type your answer...

A quia.com/quiz/7898892.html?AP_rand%3D1784472953 UIA FAQ About Log in Subscribe now 30-day free trial Home 201208 Assessment for Scoutlier Significant Figures Calculations Go to 1 - Not answered v Go stion 1 of 20 1. When expressed as 7.5x10^4, only the significant figures of are to.be considered. (1 point) O 7.5 7.05 O 7.005 O None of the, above Submit answer Skip for now Save progress or end quiz

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 xs

H4

4-The density of water at 4°C\is known to be 1.00 g/ml kim experimentally found the density of water to be 1.085 g/mL What is her percent error?

all blanks only have one correct answer  Blank 1 answer choices:  A B C Blank 2 answer choices:  A and B  A and C C and B Blank 3 answer choices:  A B C Blank 4 answer choices:  A B C