The gold content of an ore is being measured. The results of these analyses are:  Content (ppt) 20.065 19.999 21.054 20.533 20.088 20.112 What is the average value, standard deviation and confidence interval for this set of data?

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A: Here we are making multiplication and division to solve for the answer.  According to the rule of…

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Q: What is chromatography, and how does it work?

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Q: how do i know if my measurement is significantly different from the exact value, at least 2…

A: Given: Exact value : 0.25 Average = 0.223 Standard deviation = 0.025 RSD = 11.2 %

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A: Solved in step 2

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Q: 0.009 hm %3D cm 1.0023 dm = hm 0.2203 daL = µL %3D 515 cm = km

A:

Q: To the correct number of significant figures, what are the average and standard deviation of the…

A: The four given numbers are 7.159, 7.024, 7.183 and 7.005The average value is calculated as follows,

Q: • Part B O2 (8) +2H20 (1) + 2Cu (s)+40H (aq) + 2Cu (aq) Express your answer using two significant…

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Q: Data Set (all ±0.001g) Mass Mass ID Mass of Mg| ribbon /g Trial crucible + crucible + lid + lid /g…

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A: The objective of the question is to identify the correct statement.

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Q: Perform Dixon's Q-test for the following data points. Make a conclusion to reject or retain the…

A: Here the questionable value is the highest value, which is 1.9765 (Sample No-6) because it has the…

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A: The explanation is given below-

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Q: Norepinephrine can be analyzed in human urine. A fixed amount of DHBA was added to each sample and…

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Q: A certain data set has low accuracy, but high precision. Which of the following statements about…

A: There is very little random and systematic error. Because random error causes one measurement to…

Q: Help me find the % deviation : #1: 7.77 #2 : 7.78 #3: 7.74 i know the average is 7.76…

A: Not

Q: You have a stock solution certified by a manufacturer to contain 160.0 ± 0.4 μg SO/mL. You would…

A: First, we need to calculate the absolute uncertainty for Method A. The absolute uncertainty in the…

Q: 4. In three separate trials, you determine the density of an unknown object to be: Trial 1: 11.579…

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Q: A solid object has a true mass of 91.4132 pounds. A student measured the mass of the object in a…

A: Measured mass is equal to actual mass plus the value of  percentage error of actual mass.

Q: Why should the selected rule(s) be followed? A residue left on the balance will contaminate the…

A: The given statements are A residue left on the balance will contaminate the balance pan surface and…

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Q: Scenario In an investigation, lab groups combine two compounds, as shown below. Based on the data…

A: Given mass of magnesium is 5 gram and given mass of HCl is 15 gram . first we are going to calculate…

Q: Describe the difference between accuracy and precision. How do we determine accuracy and precision?

A: Accuracy is the measure of closer agreement between true value or accepted value and  specific…

Q: You have measured the mass of samples A,B,C,D, and E on the analytical balances in our chemistry…

A: ∵ Standard deviation S=ΣXi-X2n-1Where ,         X=sample average         Xi=Individual values in…

Q: number of significant figures. To avoid rounding errors, do not round your answers until the very…

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Q: 1. The true value of a particular measurement is 131.0 µg/L. Four chemists (A, B, C and D) each…

A: We need the answers of Q.1 to solve Q.3. So let's start from Q.1 #1:  Given the true value of the…

Q: Does the answer need 2 sig figs or 3?

A: Estimated Value, EV = 2.8 g/cm3  True Value, TV = 2.702 g/cm3

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A: Percent Error CalculationFor Copper:Calculate the percent error for copper:%ErrorCu=∣Experimental…

Q: How many of the following should be included in a good hypothesis? (1) A prediction of the results…

A: A hypothesis can be defined as a proposed explanation for a phenomenon that has been observed.

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A: Mass of calcium carbonate in air = 100 g Density of calcium carbonate = 1.33 g/mL

Q: The accepted density of Manning is 18.00g/mL. Your lab team measures the density of Manning to be…

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Q: Give the standard deviation of the following numbers: 2.01, 2.10, 2.20, 2.41. Use appropriate…

A: The formula to calculate   the standard deviation is : σ = ∑0i(Xi -X)¯     2/N Where  σ = standard…

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A: Given: Mass of mixture is 20.100 g. Mass of initial filter paper 21.206 g. Mass of filter paper and…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H20: 4 NH3 (g) + 7 02 (g)…

A: