A standard curve for absorbance vs. concentration has an equation of y = 2.0x.  If an unknown compound has an absorbance of 0.856, what is its concentration? Units not required. Report your answer to the correct number of significant figures.

Q: Briefly describe the purpose and importance of the following procedures in the analytical process:…

A: Sample preparation is the most important step in chemical analysis to start with.

Q: How is accuracy and precision related to errors incurred in the chemical analysis? Why systematic…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: Question 34

A: Mixture: Combination of two or more different materials in a way that no chemical reaction occurs.…

Q: You can calculate cost effectiveness using the following formula: volume of HCI neutralized per…

A: It is given that 23.73 mL of HCl is needed to neutralize one doze which is 2 tablets and the cost of…

Q: Which scale is most useful for reporting data from the spectrometer? Why?

A: The two scales used for analysis in UV spectroscopy is percent transmittance and absorbance.

Q: Calculate the surface area in nm^2 of water contained in a watch glass with a diameter of 9.0cm. The…

A: Given,Diameter = 9.0 cm

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: This question can be solved using simple subtraction.

Q: The density of gold metal is 19.3 g/cm3, while that for silver is 10.5 g/cm3. Suppose you had the…

A:

Q: Identify all of the true statements, regarding elements, compounds, and pure substances.   a)Pure…

A: Elements consist of a single type of atoms. They cant be further divided into smaller structures and…

Q: 6. Given your experience in mass determinations (Experiment 1) and with volumetric glassware…

A: There is two common methods mostly used in chemical laboratory are the determination of mass and…

Q: A mixture that is formed in such a way that each of its components retain their identity and the…

A: The type of mixture has to be identified.

Q: A physical property is; A) The ability of a sample to undergo change B) A property the sample…

A: We need to give a definition of a physical property based on the fact of change of composition.

Q: Explain three different types of mass spectrometers. Differentiate them, construction,working and…

A: Interpretation - To explain three different types of mass spectrometers and we have to differentiate…

Q: A student needs exactly 25.0 mL of a 1.5M solution of NaOH (molar mass: 40.00 g/mol). They have…

A: Given: Concentration of NaOH = 1.5 M Volume of solution required = 25.0 mL = 0.025 L…

Q: A student performed an analysis of a sample for its calcium content andgot the following results:…

A: The question is based on the concept of analytical chemistry. we have to explain regarding accuracy…

Q: Consider a cellphone operating at the radio frequency of 2.99 x 108 s1. What is the wavelength of…

A: We know that : E = hv = hC/lambda  So, v (Frequency) = C(velocity of light)/lambda (Wavelength)  Or,…

Q: These are components of a sample that is of interest to the chemist, usually taken as a…

A:

Q: 1) Which of the following is chemical property? A. Objects made of silver become tarnished. 3+ B.…

A: Chemical property of a substance is the property that observed after or during the chemical…

Q: The relationship between ppm with M and N: ppm = M x M.mass x 1000 ppm = N x Eq.mass x 1000 %3D

A: ppm stands for "parts per million" and it also can be expressed as milligrams per liter (mg/L). This…

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: You begin preparation of the calibration curve to measure absorbance vs concentration of FeSCN2+. To…

A: Molarity is the way of expressing concentrations which is defined as moles of solute dissolved per…

Q: It has been estimated that there is 4.00 × 10-4 mg of gold per liter of seawater. At price of…

A: 1 km3 = 1012 L Therefore, 7.53 km3 = 7.53  x 1012 L

Q: Which of the following is incorrect: a. General steps in quantitative analysis include: Method…

A: Chemical analysis are of two types : 1. Quantitative analysis 2. Qualitative analysis

Q: How is accuracy and precision related to errors incurred in the chemical analysis?

A:

Q: It is estimated that an adult person contains 6.3 × 103 ppm phosphorus. What mass of phosphorus in…

A: By definition, ppm refers to parts per million.  Therefore, ppm of phosphorus in adult person would…

Q: A 4-M sample of hydrochloric acid, HCl, has a density of 1.42 g/ml. What is the mass % (wt/wt) of…

A:

Q: Suppose now that you wanted to determine the density of a small crystal to confirm that it is…

A: total volume = 20.0 mL volume of CHCl3 = x volume of CHBr3 = 20 - x total mass = 20 x 2.07 = 41.4 g…

Q: A substance composed of 2 or more elements in a fixed, definite proportion is considered a…

A: Answer :- Option C is correct answer.    Compounds   Compounds are made up of two or more elements…

Q: All of the platinum ever mined = 25 ft3 What is the price of all of the paltinum ever mined?…

A: The conversion of volume of platinum from 25 ft3 into cm3 can be done as,

Q: What is the edge length of a cube whose mass for aluminum is 3.44g? Density is 2.70 g/cm3 and Volume…

A: In this question, we want to determine the value of edge length.  You can see details Solution how…

Q: 2. Calculate the volume of 435 g block of copper. d=m =V=Mv =H359 8.939lcm3 48.712 3D 5. A…

A: Since we only answer one question, we’ll answer the first one. As you have solved the first question…

Q: Given your experience in mass determinations and with volumetric glassware, which factor used in…

A:

Q: 2. You can identify a metal by carefully determining its density. A 2.166 g piece of an unknown…

A: Density of a substance is defined as its mass per unit volume.  Mathematically,  Density(d) =…

Q: Which methods separate a mixture according to the size of the particles? distillation and…

A: Given: To identify the methods which separate the mixture based on the size of the particles.

Q: How is accuracy and precision related to errors incurred in the chemical analysis?

A: In chemical analysis there are mainly two categories of measurement. Qualitative analysis…

Q: Given your experience in mass determinations and volumetric glassware, which factor used in…

A: The density can be determined by using the following formula,

Q: 4R) The recommended adult dose of Elixophyllin®, a drug used to treat asthma, is 6.00 mg/kg of body…

A: Given: Mass of drug = 6.00 mg/kg mass of person = 134lb To find: The mass of dose in mg

Q: Which of the following is correct? Gold nanoparticles are non-metals Gold nanoparticles are metals…

A: To find: The correct statement

Q: About Sampling, tick only the incorrect alternative(s): A) Identifying the nature of a substance…

A: B) A type of error that is known due to procedures that cause a measure to be too large or too small…

Q: given your experience in mass determinations (Experiment 1) and with volumetric glassware…

A: Density of a substance can be calculated from mass and volume of it.  The more precise measurement…

Q: A student needs to identify an unknown substance found in the lab based on its physical properties.…

A: We are given physical properties like mass and volume and density data, and we have to identify the…

Q: Suppose you prepared a plot for this experiment and the equation of the trendline was y =…

A:

Q: Which statement is FALSE? O A pure substance can be varied by changing the proportion of pure…

A: A pure substance is made purely by a single substance while a mixture is made up of two or more pure…

Q: 2. The Mercaptan content of household gas supplies is monitored continually to ensure that the gas…

A: As per our guidelines we can only solve first three sub-parts . Please resubmit other questions as…

Q: The maximum level that the EPA considers safe for lead air pollution is 1.5 micrograms per cubic…

A: Given : Volume of lungs = 5.30 L And maximum safe level concentration of lead = 1.5 µg/m3

Q: K   = 0.2246 meq/100g, Mg = 5.3 meq/100g, Ca = 10.4538 meq/100g weight of 1 Ha = 7.761 x 10^6 Kg how…

A: