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Harry Gim

Harry G.

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The graph displays the number of associate degrees conferred in the United States at the end of selected academic years. The variable $x$ represents the number of years since the study began, and the variable $y$ represents the number of associate degrees in thousands. (GRAPH CANT COPY) a. Use the points $(20,455)$ and $(34,665)$ to create a linear model of the data. b. What does the slope mean in the context of this problem? c. If this linear trend continues, estimate the number of associate degrees that will be conferred in the United States for year 45.

The graph displays the number of associate degrees conferred in the United States at the end of selected academic years. The variable $x$ represents the number of years since the study began, and the variable $y$ represents the number of associate degrees in thousands. (GRAPH CANT COPY) a. Use the points $(20,455)$ and $(34,665)$ to create a linear model of the data. b. What does the slope mean in the context of this problem? c. If this linear trend continues, estimate the number of associate degrees that will be conferred in the United States for year 45.

Intermediate Algebra

Linear Equations in Two Variables and…

Applications of Linear Equations and…
Once an antibiotic is introduced to bacteria, the number of bacteria decreases exponentially. For example, beginning with 1 million bacteria, the amount present $t$ days from the time penicillin is introduced is given by the function $A(t)=1,000,000(2)^{-t / 5}$. Rounding to the nearest thousand, determine how many bacteria are present after a. 2 days b. 1 week c. 2 weeks

Once an antibiotic is introduced to bacteria, the number of bacteria decreases exponentially. For example, beginning with 1 million bacteria, the amount present $t$ days from the time penicillin is introduced is given by the function $A(t)=1,000,000(2)^{-t / 5}$. Rounding to the nearest thousand, determine how many bacteria are present after a. 2 days b. 1 week c. 2 weeks

Beginning and Intermediate Algebra

Exponential and Logarithmic Functions…

Exponential Functions
A. Given polynomials $p, q, r,$ and $s$ such that $q \neq 0$ and $s \neq 0, \frac{p}{q} \cdot \frac{r}{s}=\frac{\square}{\square}$ B. Given polynomials $p, q, r,$ and $s$ such that $q \neq 0, r \neq 0,$ and $s \neq 0, \frac{p}{q} \div \frac{r}{s}=\frac{\square}{\square}$

A. Given polynomials $p, q, r,$ and $s$ such that $q \neq 0$ and $s \neq 0, \frac{p}{q} \cdot \frac{r}{s}=\frac{\square}{\square}$ B. Given polynomials $p, q, r,$ and $s$ such that $q \neq 0, r \neq 0,$ and $s \neq 0, \frac{p}{q} \div \frac{r}{s}=\frac{\square}{\square}$

Intermediate Algebra

Rational Expressions and Rational…

Multiplication and Division of Rational…
During a drought, the average water level in a retention pond decreased linearly with time. (GRAPH CANT COPY) a. Let $y$ represent the water level (in feet) and $x$ represent the number of days since the beginning of the drought. Usethe ordered pairs given to write a linear equation to estimate the water level based on the number of days since the drought began. b. Use the linear equation to approximate the water level after 15 days. c. Use the linear equation to approximate the water level after 25 days. d. What is the slope of the line and what does it mean in the context of this problem? e. Interpret the meaning of the $x$ -intercept. Do you think that this linear trend will continue indefinitely? Explain your answer.

During a drought, the average water level in a retention pond decreased linearly with time. (GRAPH CANT COPY) a. Let $y$ represent the water level (in feet) and $x$ represent the number of days since the beginning of the drought. Usethe ordered pairs given to write a linear equation to estimate the water level based on the number of days since the drought began. b. Use the linear equation to approximate the water level after 15 days. c. Use the linear equation to approximate the water level after 25 days. d. What is the slope of the line and what does it mean in the context of this problem? e. Interpret the meaning of the $x$ -intercept. Do you think that this linear trend will continue indefinitely? Explain your answer.

Intermediate Algebra

Linear Equations in Two Variables and…

Applications of Linear Equations and…

Questions asked

ANSWERED

Lijeesh Krishnan verified

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Draw the major product of this reaction. Ignore inorganic byproducts. HBr (1 equiv) H2O2

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Please provide an introduction to the synthesis of ibuprofen and a brief overview about what the molecule is used for as well as a brief description and overview of the 12 principles of green chemistry.

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Please help: Comparing Two Routes for Synthesis of Ibuprofen Using information regarding Atom Economy as well as other Principles of Green Chemistry, analyze the merits of the two routes for synthesizing Ibuprofen. Please discuss atom economy, byproducts, cost of reagents, and the techniques that could be utilized in both routes. Compare and contrast the two routes. Which route is better? Would you choose one over the other? Table for calculating atom economy below should be included with your discussion.   --Stoichiometric Coefficient, Name of Starting Material --Atomic Symbol, Quantity, Atomic Mass of each atom --Mass (Quantity Times Atomic Mass) of all atoms --Atoms Utilized in Product --Mass of Atoms Utilized in Product --Atoms Wasted in Byproducts --Mass of Atoms Wasted in Byproducts PLEASE SEE PIC: Route 1: The Boots Company Synthesis of Ibuprofen Route 2: The BHC Company Synthesis of Ibuprofen

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Annotate with any and all relevant signals. include both wavenumber and the type of stretch/bend responsible for each of the annotated absorption bands. Determine the functional group identity of the experimental IR spectra. Discuss your reasoning. Thanks in advance

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thanks in advance QUESTION- SEE PHOTO- Annotate with any and all relevant signals. include both wavenumber and the type of stretch/bend responsible for each of the annotated absorption bands. Determine the functional group identity of the experimental IR spectra. Discuss your reasoning.

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Alcohol Dehydration Reaction – A Zaitsev Elimination Objectives - Perform an organic synthesis (dehydration/elimination reaction) - Discuss green chemistry principles applied in this experiment - Apply simple distillation to isolate product - Distinguish between Zaitsev and Hoffman products by GCMS Preparation for the Laboratory Review the section on reflux and simple distillation in your techniques manual. Review the reaction mechanism from lecture notes. Complete the pre-laboratory report. Remember that anytime a synthesis is performed, the reaction (and if known, the mechanism) should be included in the objective/introduction. Do not worry about the exact structure of Montmorillonite KSF clay for the chemical data table. The purpose of this reagent is to act as the catalyst and dehydration agent. Obtain appropriate spectra of reactants and products from the SDBS Spectral Database. Procedure 1. To a 25 mL round bottom flask, add 5 mL of 2-methylcyclohexanol and 0.25 g of Montmorillonite KSF Clay with a magnetic stirring bar. 2. Attach a condenser and reflux the solution while stirring for 90 minutes. Make sure to set up the water pumps correctly. Set up the apparatus to heat on the heating mantle on top of a stir plate. 3. Remove the flask from the heating mantle and allow it to cool to close to room temperature before moving on. 4. Attach a distillation head and perform simple distillation to distill the product away from the unreacted alcohol and the catalyst. Collect approximately 2 mL of the product. 5. If time allows, analyze the product via GC MS and determine the percentages of the different isomers in the product mixture. Otherwise, save product in a clean, dry scintillation vial and save until the following week. Wrap the seal with Parafilm. Materials 2-methylcyclohexanol Montmorillonite KSF Clay Disposal Montmorillonite KSF Clay can be recycled and reused. Allow the leftover alcohol to evaporate in the fume hood. QUESTION? 1. How could someone go about checking the progress of the reaction during the 90- minute reflux? There may be more than one feasible method. 2. What is one safety concern anytime a distillation is performed?

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Green Chemistry Institute Atom Economy American Chemical Society Page 3 Reaction: Saponification \( +3 \mathrm{NaOH} \) Triglyceride Ghecrol Sodium palmitate (a soap) General Reaction Mechanism for Saponification: Step 1: Nucleophilic attack by the hydroxide Step 2: Leaving group leaves. Step 3: Deprotonation due to the basic environment.

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please can you help annotate with any and all relevant signals. include both wavenumber and the type of stretch/bend responsible for each of the annotated absorption bands.

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Unknown 2: Mass spec parent ion has \( \mathrm{m} / \mathrm{z}=82.08 \) Elemental Analysis: \( 87.73 \% \mathrm{C}, 12.27 \% \mathrm{H} \) HOl: Chemical Formula: Structure:

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Instructions: Predict the structure for each of the three unknowns. Please provide relevant information regarding each peak and the rationale for how you came to identify each structure. Label any and all peaks. Show all work and provide extra paper if needed. Unknown 1: Mass spec parent ion has \( \mathrm{m} / \mathrm{z}=88.09 \) Elemental Analysis: \( 68.13 \% \mathrm{C}, 13.72 \% \mathrm{H}, 18.15 \% \mathrm{O} \quad \mathrm{HDI} \) Chemical formula: Structure:

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