3 CHE 408 Home workMarch 14. 2018Due March 21, 20181. An unknown hydrocarbon has a molecular ion peak at m/z = 84 with arelative intensity of 31.3. The M+1 peak has a relative intensity of 2.06 andthe M+2 peak has a relative intensity of 0.08. What is the possible molecularformula of the compound?2. The mass spectrum of an unknown liquid shows a molecular ion peak atm/z=78 with a relative intensity of 23.6. The relative intensities of theisotopic peaks are:m/zRelative intensity791.00807.55810.25What is the likely molecular formula of the unknown?

According to Q&A guidelines of Bartleby, we are supposed to answer only the first question out…

1. An unknown hydrocarbon has a molecular ion peak at m/z = 84 with a relative intensity of 31.3. The M+1 peak has a relative intensity of 2.06 and the M+2 peak has a relative intensity of 0.08. What is the possible molecular formula of the compound?

1. An unknown hydrocarbon has a molecular ion peak at m/z = 84 with a relative intensity of 31.3. The M+1 peak has a relative intensity of 2.06 and the M+2 peak has a relative intensity of 0.08. What is the possible molecular formula of the compound?

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter28: High-performance Liquid Chromatography

Section: Chapter Questions

Problem 28.17QAP: Mass spectrometry is an extremely versatile detection system for GC. However, interfacing an HPLC...

See similar textbooks

Related questions

Q: All polysaccharides consist of sugar monomers joined together by O a. ester linkages O b. amide…

A: Linkage between sugars in all polysaccharides.

Q: Consider the following reaction: 2- bromooctane reacted with Sodium tert-butoxide complete reaction…

A: 2-bromooctane + sodium tert-butoxide --> ->Sodium tert-butoxide has more basic character than…

Q: voltaic cell is constructed with one cell consisting of an Cd electrode in 1.0 M Cd 2+ and another…

A: Given-> [Cd2+] = 1.0 M [Sn2+] = 1.0 M ->Cd electrode losses mass , Sn electrode gains mass.

Q: Which condition will increase the aqueous solubility of AgBrO3? choose from the ff: AgBr is added…

A: To identify: Addition of what will increase the solubility of AgBrO3. The solubility reaction of…

Q: How many electrons would the most stable cation of Ca have

Q: 3. Given: Soda and lime are added to a glass batch in the form of soda ash (Na₂CO,) and limestone…

A: We have to calculate the weight of soda ash and Limestone that must be added to 110 lbm of SiO2 to…

Q: A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 × 10²7 g. Use this information to…

Q: A common application of the "supersaturation technique" can be seen in the SUGAR INDUSTRY, where…

Q: 1. Enumerate the IMFA present on these molecules. a. (CH3)3N b. CH3OCH3

A: Intermolecular forces of attraction are the forces that exist between two or more different or…

Q: What is the molality of a solution in which 13.7 g of sodium sulfate, Na2SO4, has been dissolved in…

Q: Write a balanced net ionic equation to show why the solubility of Pb3(PO4)2 (s) increases in the…

Q: Consider the following reactions 2- bromooc tame reacted with Sodium tert-butoxide Complete reaction…

Q: An allylic free radical halogenation occurs to give the major product shown. Note NBS is a source of…

A: Detail mechanistic pathway is given below

Q: A coffee-cup calorimeter contains 20 mL of water with an initial temperature of 24.8°C. An unknown…

Q: True or False _____1. A change in temperature in reaction will change the value of the equilibrium…

Q: Calculate the [H] and pH of a 4.73 x 10 M iodoacetic acid solution. The K, of iodoacetic acid is…

A: Given : Concentration of iodoacetic acid = 4.73 x 10-4M

Q: Direction: Cite 5 elements that can be magnetized and 5 that can nullify magnetism. MAGNETIZERS…

A: Magnetisers can be defined as the substances that can impart magnetism to other substances.

Q: The lattice energy and heat of hydration for lithium hydroxide (LiOH) are -1021 kJ/mol and -1044.5…

A: Answer: Heat gained by solution will be: Q=mC∆T Here: Q=heat gainedm=mass of solutionC=heat capcity…

Q: 7) Contains C,H,O ketone MASS SPECTRUM 100 80 60 40 20 0.0 10 20 30 40 50 60 m/z NIST Chemistry…

A: Molecular ion = 72. m/z = 43 belongs to acetyl cation. Therefore the compound is 2-butanone.

Q: Is possible to make a buffer pH 4 at 1mM using methanesulfonic acid and sodium tartrate? Please…

A: To explain: Is it possible to make a buffer pH 4 at 1mM using methanesulfonic acid and sodium…

Q: Problem 4: Given the following reactions and their enthalpy changes, calculate the enthalpy change…

Q: Determine if the synthesis of sulfuric acid is a spontaneous reaction at 25°C. Chemical Equation: S+…

Q: For the titration of 50.0 mL of 0.0500 M Sn2+ with 0.100 M Tl3+. Both the titrand and the titrant…

A: Known [Sn2+] = 0.0500 M ; Volume = 50 mL [Tl3+] = 0.100 M ; Volume used = 5 mL Concentration of HCl…

Q: Assuming that no equilibria other than dissolution are involved, calculate the concentrations of…

A: The salts given are Sr(OH)2·8H2O and Mg(OH)2.

Q: A 0.5843-g sample of a plant food preparation was analyzed for its N content by the Kjeldahl method,…

Q: Example 5. Give the number of unpaired electrons in the fol- lowing: (i) Cr²+ (Z = 24) (iii) Mn²+ (Z…

Q: Check all the possible ways by which the AS univ associated with a chemical reaction can be…

A: To identify: The ways which will give positive ΔSuniv.

Q: The preparations of two aqueous solutions are described in the table below. For each solution, write…

A: The solutions given are,

Q: + 0 |||

A: 1. Acetylene on reaction with NaNH2 and methyl iodide produces methyl acetylene. Methylacetylene on…

Q: Given two buffer solutions: Buffer 1 : 0.200 M CH3COOH - 0.200 M NaCH3COO Buffer 2 :…

Q: A mixture of 0.15 M acetic acid and 0.34 sodium acetate is given. Calculate the pH of the medium if…

Q: Determine if the redox reaction of iron and water to form ferric chloride is spontaneous at 29°C.…

Q: For the following reaction, 15.9 grams of chlorine gas are allowed to react with 7.20 grams of…

A: Mass of chlorine = 15.9 g Mass of water = 7.20 g Molar mass of Chlorine = 70.90 g/mol Molar mass of…

Q: immersed in a solution where [Cu²+] = 1.00 M, is 0.340 V. The positive voltage indicates that the…

A: The standard reduction potential for the copper is given to be 0.340 V. We are required to find out…

Q: Calculate the magnetic moment of Mn in K4[Mn(NCS) 6].

A: The magnetic moment of coordination complexes is calculated using the following formula: μ=nn+2…

Q: Half-reaction E° (V) Br₂(1) + 2e¯ →→→→→→ 2Br¯(aq) 1.080V Cu²+(aq) + 2e¯ →→→→ Cu(s) 0.337V Mn²+(aq) +…

A: Oxidizing agent is the species that oxidizes the other species and itself gets reduced. Reducing…

Q: What is the volume of gas in liters at 1.00 atm if it originally occupies 2.00 L at 158 mmHg?

A: We will use the formula as :- P1V1 = P2V2

Q: Write the Haworth and conformational formulas for anomeric sugars. Explain the relative stabilities…

A: The Haworth conformation for the anomeric sugars are needed to be provided. The relative stability…

Q: please answer a-e Consider the diatomic cation NF2+. Draw the MO diagram and answer the following…

A: NF2+ = total number of electron = 14 We have to determine the electronic configuration of NF2+…

Q: Consider this reaction: At a certain temperature it obeys this rate law. rate = (0.988 M¹-s ¯¹)…

Q: 18. (R)-Butane-1,2,4-triol 19. 2-Chlorohex-3-yn-1-ol 20. (1R,2R)-Cyclopentane-1,2-diol

A: Note : as per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost…

Q: с + O

A: 1. Acetylene reaction with NaNH2 and methyl iodide produces methyl acetylene. Methyl acetylene on…

Q: How many liter of a 10% Lysol solution are needed to prepare 100 mL of a 3% Lysol solution?

Q: 140 130 120 110 100 90 80 70 60 50 40 30 20 10 Solubility (g/mL) Potassium nitrate Sodium chloride…

A: The solubility curve given is,

Q: Combustion of hydrocarbons such as pentane (C5H₁2) produces carbon dioxide, a "greenhouse gas."…

Q: the efficiency of a chromatographic column improves the measure that a.increases the height of the…

A: To determine what improves the efficiency of a chromatographic column:

Q: Which statement is correct for the cell with a notation Pt /Cl2(g)/Cl¯(aq) // Zn+2(aq)/Zn ?…

A: As we know in Galvanic cell, work is done by the gas And Anode is negative electrode and cathode is…

Q: Chapter 13. Give 5 examples of wetting in polymer chemistry "problems", much like the wetting…

A: Wettability is ability of a liquid to maintain contact with solid surface.wettability is measured by…

Q: 十 III

A: 1. Acetylene reacts with NaNH2 and methyl iodide produces methyl acetylene. Methyl acetylene on…

Q: What molecular shape do you predict for ammonia?

A: Detail description is given below

Concept explainers

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

CHE 408 Home work
March 14. 2018
Due March 21, 2018
1. An unknown hydrocarbon has a molecular ion peak at m/z = 84 with a
relative intensity of 31.3. The M+1 peak has a relative intensity of 2.06 and
the M+2 peak has a relative intensity of 0.08. What is the possible molecular
formula of the compound?
2. The mass spectrum of an unknown liquid shows a molecular ion peak at
m/z=78 with a relative intensity of 23.6. The relative intensities of the
isotopic peaks are:
m/z
Relative intensity
79
1.00
80
7.55
81
0.25
What is the likely molecular formula of the unknown?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40, a student found that her best fit linear line for FD&C Red 40 was y = 2,681x + -0.002. Her Kool-Aid sample had an absorbance of 0.337. If 0.55 grams of Kool-Aid powder was used to prepare an 8-fl oz cup of her assigned flavor, what is the percent by mass of FD&C Red 40 in her 8-fl oz cup?
A solution prepared by dissolving 25.8 mg of benzene (C6H6, FM 78.11) in hexane and diluting to 250.0 mL has an absorption peak at 256 nm, with an absorbance of 0.266 in a 1.000-cm cell. Hexane does not absorb at 256 nm. Find the molar absorptivity of benzene at this wavelength.
Exactly 10.00-mL aliquots of a solution containing phenobarbital were measured into 50.00-mL volumetric flasks and made basic with KOH. The following volumes of a standard solution of phenobarbital containing 2.000μg/mL of phenobarbital were then introduced into each flask and the mixture was diluted to volume: 0.000, 0.500, 1.00, 1.50, 2.00 mL. The fluorescence of each of these solutions was measured with a fluorimeter, which gave values of 3.26, 4.80, 6.41, 8.02, 9.56, respectively. a. plot the data. b. derive a least squares equation for the data plotted in (a). c. find the concentration of phenobarbital from the equation in (b). d. calculate a standard deviation for the concentration obtained in (c).
Calculate the HDI of each FM and propose 2structures for two molecules that are isomers.Specify what the indicated absorption (s) shouldbe to.a.C7H15NO with strong absorptions in 3400, 3270and 1670, 1390, and 1370 cm-1b. C6H10O with absorptions in 2065 (m), 1685 (f),1650 (m) and 970 (f) cm-1c. C9H12O, with absorptions in 1600 and 1500 and1245 cm-1.
Using a 60 MHz spectrometer, a chemist observes the following peak: doublet, J = 7 Hz, at 2.50 ppm What would be the chemical shift of this same peak as measured by a 300 MHz spectrometer? (Include units.)
Which of the following statements about the mass spectrum of CH3Br is correct? A.) presents two peaks of intensity 3: 1 with m / z equal to 94 and 96 b.) presents two peaks of equal intensity with m / z equal to 94 and 96 C.) presents a single peak of the molecular ion with m / z of 44 D.) has a single peak of the molecular ion with m / z of 95
A calibration curve for a newly developed dye was prepared using a cuvette of pathlength 1.0 cm and illumination at 421 nm. What is the concentration (μM) of dye in a sample if an absorbance of 2.14 was recorded upon placement into a spectrometer?
1. at what wavelength was Pb determined? 2. What is the slope of the calibration curve? 3. What is the y-intercept of the calibration curve? 4. The researcher determined the Pb content of water sample from a river suspected to be contaminated with Pb from a nearby factory by complexing with cyanidine and the absorbance measured was 0.405. What is the lead content of the water sample?
The following calibration data were obtained by an atomic absorption spectrophotometric (AAS) method for the determination of mercury in an herbal product. 1. Calculate the calibration sensitivity.2. Calculate the coefficient of variation for the mean at 6.00 ppm 3. What is the detection limit for the method? 4. What is the limit of quantitation for the method?
what mass differences can be resolved at m values of 100, 500, 1500, 3000 and 5000 if the mass spectrometer has a resolution of 500?
The molecular ion peak, M at m/z 124 and the relative abundance of M, M+1, and M+2 is 100%, 2.21%, and 99.86%. Determine all the possible chemical formulas based on the given information.
What is the resolution in ppm NO3-N of a spectrophotometer that gives a reading of 0.600 absorbance units for 25 ppm NO3-N? The resolution of the instrument is 0.001 absorbance units.