Calculate the percent error for the following measurements: (a) The density of alcohol (ethanol) is found to be 0.8060 g/mL (true value = 0.7980 g/mL).  (b) The mass of gold in an earring is analyzed to be 0.8478 g (true value = 0.8644 g

Q: When you perform the following operations, how many significant figurės should your answer have?…

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Q: Indicate which of the following are exact numbers: (a) themass of a 3- by 5-in. index card, (b) the…

A: In scientific work, the given number is either exact number, those values are known exactly, or…

Q: How do I find the scientific notation of 82,000,000 s if the number of signtificant figures is 4?

A: The number given is 82,000,000 s And number of significant figures required in final answer is 4.

Q: A gallon (3.78L) of latex paint can cover 385 ft2 of the surface of a wall. What is the average…

A: Since, 1 L = 103 cm3∴3.78 L = 3.78 x 103 cm3Since 1 ft2 = 929 cm2∴ 385 ft2 = (385x929) cm2…

Q: Calculating the density of a rectangular wooden block (fig 3). In determining the density of a…

A: Density of the substance is equal to the ratio of mass to volume. Formula: Formula of wooden block:

Q: A student converts grams to milligrams by multiplying by the conversion factor 1g /1000mg. Is the…

A:

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: The pharmacist attempts to weigh 0.375 g o morphine sulfate on a balance of dubious accuracy. When…

A:

Q: graduated cylinder weighs 35.825 g. When 10 mL of water is measured in it, the weight of the…

A: Given: Weight of the graduated cylinder = 35.825 g. The weight of the graduate and water= 45.835 g…

Q: A rectangular foil has a length of 0.0705m, and a width of 53 mm. Calculate the height of this…

A:

Q: is it possible for the calculated answer from a mulitplication or divison problem to contain more…

A: The significant number of answer in multiplication and division is determined by the number having…

Q: A student performs an experiment to determine the density of a sugar solution. She obtains the…

A: A data is said to be precise if experimental values are close to each other.  A data is said to be…

Q: A concentration solution of hydrochloric acid has a concentration of 1.202 (± 0.005) M. If 14.00 (±…

A:

Q: If all volume measurements were made with graduated cylinders instead of pipets, how would the…

A: This can be explained by the extend of the accuracy of graduated cylinders and pipets. When the…

Q: Using your knowledge of metric units, English units, and theinformation on the back inside cover,…

A: a) mm to nm    1 mm= 1mm x10-3m1 mmx 1 nm10-9m    1 mm = 106 nmb) 1 mg= 11000000kg            =…

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: The average radius of a molecule of lysozyme, an enzyme in tears, is 1.430 nm. What is its radius in…

A:

Q: An experimentrequires 45.0 g of ethylene glycol, a liquid whose densityis 1.114 g>mL. Rather than…

A: The volume of the solution is found as, 1 mL = 1 cm3

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

A: Answer : 1 tablet should contain  500 mg of paracetamol so  20 tablet contains  = 500*20 = 10000 mg…

Q: Is it faster to 1) adjust the liquid level to exactly hit a graduated cylinder measurement mark or,…

A: Accuracy is the measurement of the closeness of the value in comparison to its true value. Precision…

Q: In order to find the density of a solution of unknown density, 10 mL of solution was drawn into a…

A: Density = mass / volume.

Q: You are assigned the task of separating a desired granular materialwith a density of 3.62 g/cm3 from…

A: Given: Density of desired material = 3.62 g/cm3 Density of undesired material = 2.04 g/cm3.

Q: You have a 40-lb baggage limit for a transatlantic flight. When your baggage is put on the scale,…

A:

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

A: percentage error is given by  % error = (experimental value - actual value ) X 100 / actual value.

Q: The prescribed dose of an injected drug is 1.5 mL. If the syringe is graduated in cubic centimeters…

A:

Q: What is the percentage uncertainty with the following measurement 0.100 ± 0.005 g? Provide your…

A: Given:  0.100 ± 0.005 To find: The percentage uncertainity of the given measurement

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: ations. Calculate the volume (length x width x height) in units of mm³ (mm x mm x mm) fo large…

A: Volume = length * width* height Length = 254.7 mm Width = 25.3 mm Height= 136.8 mm Volume =…

Q: The specific gravity of a vegetable oil is 0.92. What is the mass, in grams, of 770 mL of vegetable…

A: Given : Specific gravity = 0.92  Volume = 770 ml

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: For each of the following numbers, determine the number ofsignificant figures it contains, rewrite…

A: (a) 3.050 × 10–4 can be written without scientific notation as 3.050/104 =0.0003050 has four…

Q: 2000 00010 A student has been asked to calculate the mass of an unknown liquid. He used a 10.00 mL…

A: Calculate the average mass:

Q: a rectangular solid measures 2.55 cm by 1.20 cm by 4.15 cm on each side. if it weighs 110.989 g,…

A:

Q: Suppose you were measuring out an organic liquid, and some of it is evaporated after you have…

A: The density of the substance is calculated by the relation shown below. Density=massVolume

Q: If a monolayer of stearic acid has a mass of 2.5*10^-5 g and occupies a surface area of 82 cm^2,…

A: Volume = Mass/density Height = Volume/surface area Given that: Mass of stearic acid =2.5 x 10-5 g…

Q: Ben was tasked to prepare 10 paper tabs from a 20 mg tablet for neonatal patient X. However, the…

A: mean is the sum of all observation/number of observation   absolute deviation = numerical difference…

Q: over a course of multiple trials a student measures the density of methanol to be 0.707 g/mL, 0.799…

A: Average density is the mean of all the densities i.e. ( sum of all three densities / 3 )  .…

Q: What is the uncertainty in the measured value 12.37040 after it is rounded to the following number…

A: The location of the last significant figure of a measurement shows the uncertainty. When the…

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 is the total weight of the prepared paper tabs? * Your answer What is the weight needed to…

A: Solution: A pharmacist was tasked to prepare 10 paper tabs from a 20 mg tablet. A discrepancy of…

Q: Suppose you are trying to find the volume of a box based on the given measurements for the length,…

A: Given,length, l = 2.20 inwidth, w = 3.71 inheight, h = 10.4 in + 1 in

Q: B. Perform the following calculations, and give the correct number of significant figures in the…

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Q: The speed of light in a vacuum is 3.00 x 108 m/s. What is the speed of light in kilometers per hour…

A:

Q: In determining the density of a rectangular wooden block, use the information in the table below and…

A: Concept introduction: Density of the substance is equal to the ratio of mass to volume. Formula:…

Q: Volume: 200 mL  Diameter = 5.45 cm  Height = 9.72 cm Using the equation V= ??2ℎ, calculate the…

A: Formula used :- V = πr2h

Q: The pharmacist weight 800 mg of a substance on a balance of dubious accuracy. When checked on a…

A: Percent error is defined as the ratio of absolute value (modulus) difference of true value and…

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.