How many significant figures does the number 0.00358 have? Group of answer choices a.1 b.2 c.3 d.5

Q: The glucose content of samples can be determined using Nelson’s test. The equation of the line for…

A: A numerical problem based on calibration curve that is to be accomplished.

Q: Assume for the following situations that Beer’s law remains linear. For (a) and (b), indicate…

A: Beer’s law is given by,        A=ε×c×lWhere,        A=absorbance of the solution        ε=…

Q: 4. An ethanol solution of p-aminosalicylic acid has a molar absorptivity of 1.6 x 10ʻL mol"em at a…

A: Absorbance can be calculated by the following equation: A=εbc where A: Absorbance of the solution ε:…

Q: In a pharmaceutical industry a drug Paracetamol (151.163 g/mol) is determined in a sample. A 0.0315…

A: The given data in above Molar mass of paracetamol = 151.163 g /mol  Mass of sample = 0.0315 g…

Q: an absorbance of a solution with a pathlength of 1.00 cm is 0.544 and concentration is 1.40x10^ ^ -3…

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Q: How did you decide on the wavelength at which you will read the absorbance of the diluted solutions?…

A: Absorbance of a species can be determined by using Lambert-Beer's law. According to this law…

Q: Caffeine, C8H10O2N4 H2O (MW = 212.2 g/mol) has been shown to have an average absorbance of 0.644 for…

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Q: Fe+3 (aq) + SCN – (aq) FeSCN +2 (aq)   She mixes 4.00 mL of 2.00 mM SCN– and 5.00 mL of 2.00 mM Fe+3…

A: Given: ℓ = 1.0 cm ε =2867 M

Q: The intensity of red light (680 nm) and sorted by a solution of green dye was found to be 1.99 V and…

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Q: The molar absorptivity for the FD&C dye “Red No. 3” (Erythrosine) 8.25104 M‒1·cm‒1 at 526 nm.…

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Q: A never circulated 1975 penny with a mass of 3.00 g was dissolved in concentrated nitric acid, the…

A: Absorbance is plotted on y-axis and concentration is plotted on x-axis. Mass of penny dissolved in…

Q: of students made 5 standard solutions and measured their corresponding absorbance values at group a…

A: As per Beer-Lambert's law,

Q: A. Copper sulfate pentahydrate is often used to teach students about Beer’s Law by making a standard…

A: Here we are required to volume of stock solution required to prepare various diluted solution for a…

Q: The most abundant type of mammalian antibody circulating in the blood stream is IgG. A solution…

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Q: Calculate the molar absorptivity of a 1.00 x 10-4 M solution, which has an absorbance of 0.372, when…

A: The question is based on Beer's law. the formula for Beer's law is as follows: A=eLc here,…

Q: The equation of your standard curve of absorbance versus concentration (mM) is  y = 1.245x + 0.0012.…

A: Beer’s Law- The absorbance of solution is directly proportional to the concentration(c) and path…

Q: Q4 :[a] 5.00 x 10 M solution of an analyte is placed in a sample cell that has a path length of 1.00…

A: Given: The concentration (c) of the solution is 5.00 x 10-4 M The path length (b) is 1.00 cm The…

Q: A sample containing an unknown concentration of FeCl3 is measured to have an absorbance of 0.43 at…

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Q: The molar absorptivity constant of a particular chemical is 2.31 M/cm. Determine the concentration…

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Q: What is the concentration of a tyrosine solution when the absorbance at 280 nm is 1.5 using a 1 cm…

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Q: A student prepared four standard solutions of (NH4)2Fe(SO4)2 and measured their absorbance at 505…

A: According to Beer's law absorbance is directly proportional to the concentration Absorbance Vs…

Q: Assume for the following situations that Beer’s law remains linear. For (a) and (b), indicate…

A: According to Lambert's Beer Law. Absorbance is directly proportional to path length and molar…

Q: A. Copper sulfate pentahydrate is often used to teach students about Beer’s Law by making a standard…

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

Q: The molar absorptivity constant of a particular chemical is 2.31 M/cm. Determine the concentration…

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Q: The concentration of a dilute aspirin solution is 0.000530 M 0.000530  M  . Standard solutions of…

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Q: Suppose that a solution has an absorbance of 0.250 at a wavelength of 450 nm.  If the concentration…

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Q: Given the Beer’s Law, A = εbc, determine the concentration of a sample that gave  an absorbance of…

A: According to the Beer’s Law A = ε b c Where   ε = molar absorptivity (M-1 cm-1) A = absorbance b =…

Q: A 5.00×10−4 M solution of analyte is placed in a sample cell that has a pathlength of 1.00 cm. At a…

A: The molar absorptivity, also known as the molar extinction coefficient, is a measure of how well a…

Q: Calculate the molar absorptivity of a solute when its measured absorbance is 1.050 with a…

A: Formula: A = e.c.l Where, e = molar absorptivity, A = absorbance, c = molar concentration and l =…

Q: Absorbance measurements were taken on a series of Fe standards complexed with 1,10-phenanthroline. A…

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Q: A 0.100 mol dm 3 aqueous solution of nickel(II) salt shows three absorbances, one of which has a…

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Q: From experimental data, a plot of absorbance (in arbitrary units, a.u.) at a wavelength of 630 nm…

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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.