Suggest two sources of systematic error and two sources of random error in measuring the width of a 3-m table with a 1-m metal rule.

Q: A piece of metal was weighed on a laboratory balance four times and gave the following results:…

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Q: A pycnometer weighs 21.62 g. Filled with water, it weighs 46.71 g; filled with another liquid, it…

A: Record the given data, pycnometer weight = 21.62 g         [H2O]1 weight = 46.71 g         [H2O]2…

Q: Which piece of equipment gives the lowest uncertainty   Question 15 options:   100 mL beaker   25…

A: There are different type of equipments which can be used to measure the volume of any liquid…

Q: Use the formulas below and the data in the table to fill in the empty spaces in the table. (Apply…

A: The equations we will be using in filling the tables are  1) Area = Length X Width

Q: Indicate whether the following statement is true or false. It is not possible to carry-out the…

A: no we cant subtract both quantities as: pL is picolitre that is  Full name: picoliter Plural form:…

Q: why electronic configuration of coinage metals is exceptional?

A: Silver, copper and gold are the coinage metals.

Q: 20 Express the answer to this multi-step calcu- lation using the appropriate number of sig- nificant…

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Q: Convert 563 cm/s to units of meters per minute. Show the unit analysis by dragging the conversion…

A: Given, 563 cm/s  To convert it into m/min we must know conversion factors.

Q: why is statistics itself is important in the field of chemistry especially in analytical chemistry?…

A: Answer:

Q: The following statements are correct regarding errors except Random errors are indeterminate but…

A: Systematic errors is a type of error , which does not arise by chance and is introduced due to…

Q: Please help me this question! Thank you! "What is the measuring range and accuracy (i.e. how many…

A: Micropipettes are precision instruments that are designed to transfer volumes in the microliter…

Q: Discuss the Steps in Scientific Methods as mostly used in the content area of Chemistry.

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Q: A length of 155 nm can also be expressed as 1.55 x 104 pm 155000 pm O 0.155 pm 1.55 x 10-6 pm

A: 1 nm = 10-9 m 1 um = 10-6 m

Q: Explain the difference between random error and systematic error.

A: A mistaken result or false result obtained in an experiment or study is termed as error. Error is…

Q: What is the uncertainty in a measurement of 0.39 mm?

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Q: Mass of crucible, lid, and compound Trial 1 Trial 2 fired 10 min and cooled 20 min 1st mass…

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Q: Why is it necessary to calibrate lab instruments such as a thermometer and volumetric glassware?

A: An instrument that has the capability to measure the temperatures or temperature changes in a…

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: What are two precautions you must observe when using the electronic balance

A: Electronic balance is used to meothe weight of compound in labs.

Q: .c. The relative deviation (d,) of a measurement or experimental data is the deviation divided by…

A: #(c): The values obtained for percent copper(% Cu) are: 17.34%, 17.33%, 17.28%, 17.29%, 17.36%. The…

Q: In the UV assay of paracetamol you are required to weigh tablet powder “…containing 0.150 g of…

A: Answer : weight of 1 tablet = mass of tablet  /  no. of tablet  = 11.223/20 = 0.56115 g as 1 mg =…

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

A: The correct statement about the sensitivity of an analytical method is given below

Q: Which instrument(s) has (have) the greatest precision for measuring volume: 10 mL graduated…

A: The precision of a measurement system is referred  to how close the agreement is between repeated…

Q: 2pt/min=___ pt/h using dimensional analysis

A: Dimensional analysis is a method used for solving problems.This method is also known as unit factor…

Q: With these values, calculate the percentage purity.

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Q: How many picograms are in 4.28 x 10^-11g?

A: 1 picogram = 10-12 grams

Q: (i) Density of solid substance with regular shape Cuboid 16.315 Shape of the solid substance Mass of…

A: Given data: The mass of the solid substance=16.315 g. Length=5.0 cm. Width=4.0 cm. Height=1.9 cm. To…

Q: Given the following information determine the % difference between the two weights. Trial 1 Weigh…

A: Given that --- Trial 1: weight of boat + sample = 14.85 g  --------(i) weight of boat = 11.11 g…

Q: What volume of iron (7.87 g/cm3) would be  required to balance a 1.25 cm3 sample of lead (density…

A: Mass = Density x Volume

Q: What volume of iron (density 7.87 g/cm3) would be required to balance a 2.80 cm3 sample of lead…

A: Given- Density of iron = 7.87 g/cm3 volume of lead sample = 2.80 cm3 (V1) Density of lead = 11.4…

Q: Is the precision of your two trials within 5 %?. Support your answer with calculations

A: In order to analyze the precision of an experiment, we calculate the Percent relative standard…

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: A piece of film has a thickness of 4.50 x 10^3

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Q: A method of analysis yields masses of gold that are lower by 0.40 mg. Calculate the percent relative…

A: The percentage relative error is percentage discrepancy in finding out the exact value of a…

Q: An example of a semiconductor is ZnS with a particle diameter of 1.8 nanometers. Convert this value…

A: Applying basics relationship between nm to dm and nm to inches.

Q: What is the volume measurement indictatede in the volumetric glassware ? 1. Graduated Cylinder…

A: Among the given picture, the first image is a graduated cylinder. Graduated cylinder is also known…

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

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: llowing calculations. Round each result so that it contains only significant digits. The mbers in…

A: Solution -

Q: The standard solution is prepared by dissolving a known mass of zinc pellets with conc. HCl. The…

A: Given information, Volume (V) = 250 mL = 0.25 L Mass of Zn (m) = 0.9809 g Molecular weight of the…

Q: 1. Research on the limitation of accuracy of the following instruments: • analytical balance •…

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Q: 1-2 Bell for 34 10 eps of ind 14 6. 9. Centrilinge 1 Benedict's solution Bel for 34 min Bel for 5…

A: Digestion or breakdown of starch into soluble disaccharide or monosaccharide reducing sugar with…

Q: A method of analysis yields masses of gold that are low by 0.5 mg. This method is used for analysis…

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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: Explain why materials with very low density exhibit a greater degree of uncertainty in mass when…

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

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Q: A student calibrated a eudiometer by first recording the mass of the empty eudiometer followed by…

A: The density of water at 220C is 0.9978 g/mL

Q: Give two examples of the Method error (one of the classification of systematic error). Please do not…

A: Method error is caused by the defects in the exoerimental methods.