The theoretical density of metal is 2.70g/ cm cube. The experimental density a student found in the lab is 2.68g/ cm cube. What is the percent error

Q: What is one example of systematic error that can occur in an experiment and one example of random…

A: The difference between true value and an measured value of an experiment is known as errors. If any…

Q: Mass Length Diameter Calculated Volume Small Cylinder 6.501 g 2.30 cm 1.55 cm Medium Cylinder 10.749…

A: Use the formula provided to find out the calculated volume of each cylinder.

Q: 15. In preparing a certain ointment, a pharmacist used 28.35 grams of zinc oxide instead of the 31.1…

A: Given, mass of zinc oxide (used) = 28.35 g mass of zinc oxide (required) = 31.1 g

Q: 548.8 + 0.2 x 55.4±0.6 (1142.9 ± 0.6 – 171.0±0.5) ANS: Absolute uncertainty: Percent uncertainty:

A: The value which gives the range of true value when combined with reported value is known as absolute…

Q: Calculate the percent error for the following measurements: (a) The density of alcohol (ethanol) is…

A: Percent error is often expressed as the absolute value of the difference between the true value and…

Q: What is the numerical value of a conversion factor ?why must this be true ?

A: Numerical value of a conversion factor is answered in the next step.

Q: You record the following in your lab book: a liquid is thick and has a density of 4.58 g/mL. Which…

A: Given data, A liquid is thick and has a density of 4.58 g/mL. Which data is qualitative and…

Q: The standard definition of a quart is equal to 947 mL. Calculate the percent error of a student's…

A: Given is, Measured value= 935 mL True value = 947 mL %error=?

Q: Why are repeated trials of the same measurement desirable

A: Repeated trials means measurement of same  data repeatedly.

Q: Express the quantities using significant figures to imply the stated error. 56 + 1 =

A: Given is, 56 + 1 = ?

Q: Distinguish between accuracy and precision and between systematic and random error (§1.5) (EPs…

A: Accuracy – How close a measurement is to the actual or expected value. Precision – How close a set…

Q: the true density of methanol is 0.792 g/mL based on the answer 0.762 what is the percent error of…

A: Given— True density = 0.792 g/ ml Measured density = 0.762 g/ml

Q: e the percentage error in the measurement of the students.

A:

Q: A systematic error (A can be discovered and corrected. (B Cannot be corrected nor detected arises…

A: The correct option is:

Q: Perform the following calculation and input the answer expressed to the correct number of…

A: Non zero digits are always significant.

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: 2. The_ is a more accurate length measuring device. The uncertainty of the ruler is the uncertainty…

A: The Ruler is a more accurate length measuring device. The uncertainty of the ruler is  less than…

Q: Percent Error is defined as: % = [measured value – accepted value] / measured value x 100

A: Percent error is used to get an idea about the possible error in the experiment based on the known…

Q: Measurement of the density of a solid object. Sample you are using is Tin Volume of water in…

A: Volume of water in cylinder = 31.5 mL Volume of water in cylinder after submerging object = 36.4 mL…

Q: How are systematic method errors detected?

A: Systematic method error is a kind of systematic error. It will have a different calculated mean…

Q: what fraction of an hour is 900 seconds using dimensional analysis

A: what fraction of an hour is 900 seconds using dimensional analysis

Q: Which of the following is a good practice in weighing solid samples? A Do not return the mass…

A: For accurate and pure weighing of solid samples Use weighing paper, a watch glass, a beaker, or some…

Q: While doing a lab, a student found the density of a g/cm. The accepted value for the density of…

A: According to the question,  Measured density of pure aluminum = 2.85g/cm3 Accepted value for the…

Q: Why are percent error values never negative?

A: The percent error is given by: percent error=|(experimental value-theoretical value)/theoretical…

Q: Compare and contrast the following: (a) error and uncertainty, and (b) random error and systematic…

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: A chemistry instructor provides each student with 8 test tubes at the beginning of the school year.…

A:

Q: You decide that it is too tedious to kneel or adjust your eye level when trying to read the volume…

A: Random error causes one measurement  to differ slightly from the next. it comes from unpredictable…

Q: What are the similarities in random error and systematic error? In analytical method and graphical…

A: Answer - Random error - Random error is a chance difference between the observed and true values of…

Q: The standard definition of a quart is equal to 947 mL. Calculate the percent error of a student's…

A: Given  Actual value of quart=947 mL The measured value of quart=938 mL Percent error has to be…

Q: Find the distance between the lines on the grating, d, in nanometers if the grating is 100 lines/ 1…

A: Given that,Grating (d) = 100 lines/cm

Q: A student estimated that the volume of a crucible was 28.6 mL.  When the volume was accurately…

A: Percent error can be calculated using the following formula.

Q: Bud N. Chemist must determine the density of a mineral sample. His four trials yield densities of…

A: Given:- =>trials=>a)5.27gm/cm3                   b)5.28gm/cm3                   c)5.27gm/cm3…

Q: Why does the percent-error equation use the absolute value of the error?

A: Percent error = errorAccepted value×100%

Q: What is the percentage of error in a measurement when the experimental value is 3.80g and the true…

A: Percentage of error = (Experimental value - True value)True value×100%

Q: How to determine the number of significant figures when computing percent error? Is it based on the…

A: Percent error is given by

Q: Calculate the percent error when a known value of 5.69 is measured to be 5.85

A: Given,Measured value = 5.85Exact or known value = 5.69Percent error can be calculated as:

Q: A student measures the length of an object and obtains 3.65 cm. If thr true value (as reported by…

A: Given, Measured value = 3.65 cm True value = 3.75 cm

Q: What is the only way to reduce random error in measurements?

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

Q: I measured a line that was 8.4 centimeters which is the same as 3.375 inches. How do I calculate the…

A: The relative percentage error is equivalent to the algebraic ratio between the difference measured…

Q: What value of a measurement must be available if the accuracy of a measurement is to be determined

A: The physical dimensions of a substance are calculated by observing and taking down the measurements.…

Q: Determine the number of significant figures. 1. 3.4 / 0.025356 + 236.00 - 76.357  2. 5.6786 +…

A: Significant figures are the figures that are necessary to indicate quantity of something.

Q: An analyst weighs the same tablet three times on a well calibrated analytical balance and obtains…

A: Environmental changes, such as in temperature or humidity. Exposure to harsh conditions, such as…

Q: A loss of 0.4 mL of Zinc occurs in the course of an analysis to determine that element. Calculate…

A: Given that in an experiment involving Zn there is a loss of 0.4 mg of Zn. We need to calculate the…

Q: What is the fraction used to determine the uncertainty in a measurement?

A: For determining the uncertainty in measurement in terms of fraction  we will consider an example…

Q: g errors ce ly.

A:

Q: Based on the given data, what is the Àmax of copp 0.1 M Copper 300 0.157 325 0.233 350 0.465 375…

A: Given : We have to tell lambda max for 0.1 M copper.

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.