You have measured the mass of samples A,B,C,D, and E on the analytical balances in our chemistry lab.  Determine the standard deviation of these measurements and report your answer with at least 3 significant figures.      mass A 103.039 g B 104.404 g C 103.32 g D 104.285 g E 104.123 g

Q: You cut six segments of string that are supposedly the same length. The strings you cut were suppose…

A:

Q: Standard deviation is an indication of the... a. precision of one measurement b. accuracy of one…

A: Standard deviation:a number which is used to inform how measurements for a group are spread out from…

Q: (b) A sampling plan is necessary to ensure that a laboratory sample is truly a representative of the…

A: Sampling plan is a term widely used in research studies that provide an outline on the basis of…

Q: You drop another bead into the column and observe that it makes it all the way to the bottom of the…

A: In the question we have given that a plastic bead and we dropped in column having four different…

Q: An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d 5 1.00 g/cm3), the flask and its…

A: Given: Mass of the empty Erlenmeyer flask= 241.3g Density of water = 1.00 g/cm3 Mass of flask filled…

Q: CM 12 China Shape Sheet Version D CM China 12 10 CM 12 China 2 3

A:

Q: What is the volume of a sample of mercury (d = 13.6 g/ml) which weighs 1000. g?

A:

Q: A piece of metal thought to be either chromium , nickel or lead was weighed and found to have a mass…

A:

Q: A sample of 5 lactobacillus bacteria found in yogurt measure 7.9 x 10-6 m in total length. A second…

A: Total length of 5 bacteria = 7.9 x 10-6 m Total length of 3 bacteria = 5.2 x 10-6 m

Q: Convert 18.50 ft to the SI unit for length. A) 563.9 cm B) 0.005639 km C) 5.639 m An experimental…

A: SI unit of length is metremSI unit of mass is kg kilogram

Q: You are working in a hospital and you saw that a patient took 500 mg of ibuprofen but the chart…

A: Mean, Standard deviation and %RSD (percentage relative standard deviation) are the ways to check the…

Q: E. 50 mL beaker 20.127 9 Mass of beaker Volume of water measured in each trial 10.00ML Calculated…

A: We solve only one question according to Bartleby guidelines. First calculate mass of water in beaker…

Q: snip

A: The no. of significant figures in a reported value is the no. of digits that are known with…

Q: How do the sources of error affect precision and accuracy.

A: The sources of error affect precision and accuracy have to be given below.

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: Which of the following statements about the sensitivity of an analytical method is true? O The…

A: Two questions based on tools in analytical chemistry that is to be accomplished.

Q: A Cylindrical glass tube 20.0 cm in length is filled with acetone. the mass of the acetone to fill…

A:

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: Does standard deviation give a measure of precision or accuracy?

A: Interpretation - Does standard deviation give a mesure of precision or accuracy -      Introduction…

Q: Sample 1 precision (relative standard deviation): Sample 1 accuracy (relative error): Sample 2…

A:

Q: A 1.00 m long beam of stainless steel with a square 2.00 cm times 2.00 cm cross section has a mass…

A: Since density of any metal is given by  Density = mass of metal / volume of metal

Q: 30 30 20 20 10 10 cm cm cm cm 1) (3) 2)

A: A ruler scale is a tool which is used to measure length and in both metric and customary units.  In…

Q: 3. Round each average to reflect the precision of the data set. Standard Deviation Rounded Average…

A: In the given data set unrounded Average is given,from there rounded average has to be calculated.

Q: What is the density of a liquid, in g/mL, which has a mass of 1500 mg when the reference liquid used…

A:

Q: Which one of the following does not come under the category of systematic error? (A) Instrumental…

A: Indeterminate error does not come in the category of systematicc error. Instrumental error come due…

Q: One carat is equivalent to a mass of 0.200 g. Use the fact that 1 kg (1000 g) has a weight of 2.205…

A: Given,  The weight of a diamond is 1414 carat.  The weight of a diamond in pounds is:

Q: You are given a cube of pure adamantium. You measure the sides of the cube to find the volume and…

A:

Q: Calculate the length (in m) of a rectangular solid that weighs 95.5 g and  has a width of 2.50 cm…

A:

Q: What is the total worth of this quantity of gold?

A:

Q: Increasing the number of measurements will decrease the standard deviation increase the systematic…

A: Error formula is the absolute value of the difference of the measured value and the actual value…

Q: Identify the longest length Group of answer choices 1.04 yd 86.87 cm 3.05 ft 1.05 m 38.0 in

A: 1 yard = 3ft.1ft = 12inch. 1inch= 2.54cm.1 m= 100cm.

Q: 100- 98- 96- 94- 92- 90- 88- 86 84 82 80 78- 76+ 4000 3533 Aña 3402.5 3500 3002.41cm-1 2916.20pm-1…

A: The IR  tells about The functional  group present in the molecules.

Q: A group of students took turns using a laboratory balanceto weigh the water contained in a beaker.…

A: A group of students took turns using a laboratory balance to weigh the water contained in a beaker.…

Q: 2. In your lab you made four mass measurements using a digital balance and the bar graph shown…

A: Systematic error,  error that is predictable and error may generate due to fault in the instrument…

Q: Arrange the measurements from longest length to shortest length. Longest length Shortest length…

A: 1 cm = 0.01 m 1 nm = 10-9 m 1 yards = 0.9144 m 1 km = 1000 m From this relation first we convert all…

Q: 6.201 cm + 7.4 cm + 0.68 cm +12.0 cm =

A: These are given different value in cm. and addition of these values can done with significant…

Q: Why should the selected rule(s) be followed? Weighing wet items will cause the displayed mass to be…

A:

Q: Trial 1: 9.865 g Trial 2: 9.996 g Trial 3: 9.563 g Trial 4: 9.658 g Trial 5: 10.235 g Select…

A: Standard deviation (S) is a measure of precision. This quantity is obtained by the summation of the…

Q: A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative…

A: Percent relative error is calculated as follows; Er=xf-xixi×100% Here xi is the actual mass of the…

Q: Atomic absorption analysis for copper concentration of aircraft engine oil gave a value of 8.53 mg…

A: GIVEN Copper concentration of aircraft = 8.53 mg Cu/mL standard deviation (s) = 0.22 mg Confidence…

Q: The Scientific Method Group of answer choices isn't used much in modern chemistry. is a strict set…

A: The scientific method is defined as the method of research of procedures and principles involving…

Q: The density of a metal is calculated to 8.9377 g/cm3, using weight and volume measurements. The +…

A:

Q: Standard Deviation (mg CaC03/L water sample)

A: The standard deviation in the values of hardness (in mg CaCO3/L water sample) is to be determined.…

Q: An intensive property is one which does vary with the amount of substance, such as volume. does not…

A: Generally intensive property does not scale with system size.

Q: precise. You work in a chemistry lab. The chemical test you do is based on a color change when two…

A: The color of the reference standard is yellow The color of the first 5 samples is also yellow. The…

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.