Chemistry concepts and calculations

1. Why is it important to use a saturated solution of borate ions to determine t

1. Why is it important to use a saturated solution of borate ions to determine the Ksp? If the solution of borate ion is not saturated, the determined Ksp will be the same, lower,…

1. Why is it more difficult to design a surface that is oleophobic rather than h

1. Why is it more difficult to design a surface that is oleophobic rather than hydrophobic? 2. Why is the adhesion of the ZnO tetrapods to glass surfaces poor? How does the TEOS c…

1. Why is it necessary to allow enough time for your samples to dry? 2.What is t

1. Why is it necessary to allow enough time for your samples to dry? 2.What is the optimal amount of solvent to add during a recrystallization? Why? 3. How does rate of crystal gr…

1. Why is it necessary to run TLC in a closed container and to have the interior

1. Why is it necessary to run TLC in a closed container and to have the interior vapor saturated with the solvent? 2. You want to know the detergent composition of an extract of a…

1. Why is it necessary to wire gauze on an iron ring when using a beaker/flask t

1. Why is it necessary to wire gauze on an iron ring when using a beaker/flask to heat or boil liquids? What would you use to secure the beaker/ flask from falling? 2.Whic measuri…

1. Why is it necessary to wire gauze on an iron ring when using a beaker/flask t

1. Why is it necessary to wire gauze on an iron ring when using a beaker/flask to heat or boil liquids? What would you use to secure the beaker/ flask from falling? 2.Whic measuri…

1. Why is it not possible to reuse a heat pack in term of the chemistry? 2. Comp

1. Why is it not possible to reuse a heat pack in term of the chemistry? 2. Compare the specific heat of water to the specific heat of metal (Copper). Which would heat up faster (…

1. Why is oxygenated blood red while deoxygenated blood is blue? 2. How many pro

1. Why is oxygenated blood red while deoxygenated blood is blue? 2. How many protein chains does hemoglobin have? 3. What level of protein structure does hemoglobin have? 4 aoeeth…

1. Why is sodium acetate a weaker base than sodium ethoxide? 2. Can acetic anhyd

1. Why is sodium acetate a weaker base than sodium ethoxide? 2. Can acetic anhydride be synthesized from sodium acetate and methyl acetate with an acid catalyst? Why or why not? 3…

1. Why is the chemical shift for the Hydrogen(h) protons on the glycerol backbon

1. Why is the chemical shift for the Hydrogen(h) protons on the glycerol backbone around 5.30 ppm? Explain (photos on bottom) 2. The Hydrogen (g) protons have one next door neighb…

1. Why is the const keyword used? How does it help enforce the \'\'principle of

1. Why is the const keyword used? How does it help enforce the ''principle of least privilege''? What is ''member initialize? syntax? Define and explain in an example. 2. Please e…

1. Why is the final product from the crystallization process isolated by vacuum

1. Why is the final product from the crystallization process isolated by vacuum filtration and not by gravity filtration? 2. Imagine you failed to dry your purified benzoic acid s…

1. Why is the order of an algorithm generally more important than the speed of t

1. Why is the order of an algorithm generally more important than the speed of the processor? 2. Write the simplest big-O expression to describe the number of operations required …

1. Why must you avoid using your hands in handling the magnesium ribbon and the

1. Why must you avoid using your hands in handling the magnesium ribbon and the crucible and cover? 2.Why must objects be cooled to room temperature before taking their weights(ma…

1. Why must you avoid using your hands in handling the magnesium ribbon and the

1. Why must you avoid using your hands in handling the magnesium ribbon and the crucible and cover? 2.Why must objects be cooled to room temperature before taking their weights(ma…

1. Why was it necessary to subtract the volume of the H2O2 solution injected int

1. Why was it necessary to subtract the volume of the H2O2 solution injected into the generator from the volume of the gas collected in the gas collection in the gas collection tu…

1. Why will your fingers become dis colored if ninhydrin spray gets on your skin

1. Why will your fingers become dis colored if ninhydrin spray gets on your skin? 3. There are polarity and molecular weight differences between aspartic acid and phenylalanine: A…

1. Why would a chest x-ray examination reveal an infiltrate in the basilar segme

1. Why would a chest x-ray examination reveal an infiltrate in the basilar segments of the left lower lobe ? 2. A 52-year-old man who has smoked two packs of cigarettes per day fo…

1. Why would a chest x-ray examination reveal an infiltrate in the basilar segme

1. Why would a chest x-ray examination reveal an infiltrate in the basilar segments of the left lower lobe ? 2. A 52-year-old man who has smoked two packs of cigarettes per day fo…

1. Why would it be beneficial to slow down the rate of a very fast reaction? Giv

1. Why would it be beneficial to slow down the rate of a very fast reaction? Give at least one example of a fast reaction that is slowed down. Provide at least one citation for th…

1. Will a precipitation reaction occur when the following aqueous solutions are

1. Will a precipitation reaction occur when the following aqueous solutions are mixed? (Answer yes or no.) If the answer is yes, identify the precipitate formed. REACTION? PRECIPI…

1. Will the boiling point of a solution of 10 g of NaCl (which has no appreciabl

1. Will the boiling point of a solution of 10 g of NaCl (which has no appreciable vapor pressure at 100 oC) in 100 mL of water be higher than, lower than, or the same as the boili…

1. Wine is approximately 12% ethanol C2H5OH by volume . Ethanol has a molar mass

1. Wine is approximately 12% ethanol C2H5OH by volume . Ethanol has a molar mass of 46.06g/mol and a density 0.789g/mL. How many moles of ethanol are present in a 750mL bottle of …

1. With how many grams of hydrogen did you have to start the reaction if you wan

1. With how many grams of hydrogen did you have to start the reaction if you want to produce 50.0g of product? N2 (g) + 3 H2 (g) -> 2 NH3 (g) 2. How many grams of product would…

1. With the help of chemical equations, explain how CFCs deplete ozone in the st

1.    With the help of chemical equations, explain how CFCs deplete ozone in the stratosphere. 2.    Jet airplanes often fly in the lower stratosphere, where the pressure drops to…

1. Without doing any calculations, choose the 0.12 M aqueous solutions with a pH

1. Without doing any calculations, choose the 0.12 M aqueous solutions with a pH between 8 and 12. (Select all that apply.) NaF NH4Cl HNO2 Ba(OH)2 NaHCO3 Mg(CH3COO)2 none of the a…

1. Work with Census Data: Dowload the following file: http://www.census.gov/popu

1. Work with Census Data: Dowload the following file: http://www.census.gov/population/www/censusdata/files/urpop0090.txt The census _le is a text _le with data for the 10-year ce…

1. Would an increase in the concentration of the sulfuric acidincrease the rate

1. Would an increase in the concentration of the sulfuric acidincrease the rate of hydrogen production? Explain 2. Why are different products obtained when molten and aqueousNaCl …

1. Would the bromocresol green indicator with a transition range of 3.8 to 5.4 e

1. Would the bromocresol green indicator with a transition range of 3.8 to 5.4 ever be of use when titrating a weak acid with a strong base? Explain. 2. Explain the reason a blank…

1. Would the cell potential be higher or lower if the NH3(aq) had been added to

1. Would the cell potential be higher or lower if the NH3(aq) had been added to 1M CuSO4 solution instead of the 0.001M CuSO4 solution of the cell? Explain. 2. As the concentratio…

1. Would the reported mass percent of excess reactant be greater than, less than

1. Would the reported mass percent of excess reactant be greater than, less than, or equal to the true mass percent of excess reactant if the precipitate was not completely dry wh…

1. Write A for anti- addition or S for syn-addition to alkenes on the line provi

1.    Write A for anti- addition or S for syn-addition to alkenes on the line provided for each of the following: _______ Hydroxylation with cold Permanganate oxidation ----------…

1. Write a C++ program that defines value-returning functions for the arithmetic

1. Write a C++ program that defines value-returning functions for the arithmetic integer binary operation plus, minus, multiply, and divide, You should alsp wrote a value-returnin…

1. Write a C++ program that defines value-returning functions for the arithmetic

1. Write a C++ program that defines value-returning functions for the arithmetic integer binary operation plus, minus, multiply, and divide, You should alsp wrote a value-returnin…

1. Write a C++ program that inputs the length and width of two rectangles (in in

1. Write a C++ program that inputs the length and width of two rectangles (in integers) representing a lot size and a house. This should include one function that uses Call-by-Val…

1. Write a Java class that declares a named constant that holds the number of fe

1. Write a Java class that declares a named constant that holds the number of feet in a mile: 5,280. Also declare a variable to represent the distance in miles between your house …

1. Write a Java program FirstLastDigitsMath.java to accept any non-negative inte

1. Write a Java program FirstLastDigitsMath.java to accept any non-negative integer as a command line argument, use the Integer.parseInt function to convert this to an int data ty…

1. Write a Java program InputTester.java that: Prompts the user to enter “int”,

1. Write a Java program InputTester.java that: Prompts the user to enter “int”, “double”, or “boolean” and then scans that into a String variable choice using Scanner; If “int” is…

1. Write a MATLAB script file that calculates the mean of N numbers. The number

1. Write a MATLAB script file that calculates the mean of N numbers. The number N and the actual N umber values are being asked from the user on the screen. 2. Write a MATLAB func…

1. Write a MIPS assembly language program that asks a user and reads in a number

1.                  Write a MIPS assembly language program that asks a user and reads in a number of months to rent an apartment and how many bedroom to have. Then it should compu…

1. Write a Matlab program that will allow the user to find area and circumferenc

1. Write a Matlab program that will allow the user to find area and circumference of a circle. Selections and data entry will be done by presenting the user with a menu (using men…

1. Write a SELECT statement that returns these columns from the Products table:

1. Write a SELECT statement that returns these columns from the Products table: The ListPrice column A column that uses the CAST function to return the ListPrice column with 1 dig…

1. Write a Sub that requests a positive integer with an InputBox. Then it uses a

1. Write a Sub that requests a positive integer with an InputBox. Then it uses a For loop to sum all of the odd integers up to the input number, and it displays the result in a Ms…

1. Write a balanced equation for lead(II) nitrate with sodium iodide to form sod

1. Write a balanced equation for lead(II) nitrate with sodium iodide to form sodium nitrate and lead(II) iodide. 2. If I start with 25.0 grams of lead(II) nitrate and 15.0 grams o…

1. Write a balanced equation for the complete combustion of each of the followin

1. Write a balanced equation for the complete combustion of each of the following: a. 2,2-dimethylbutane Express your answer as a chemical equation. Identify all of the phases in …

1. Write a balanced equation for the double-replacement precipitation reaction d

1. Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients. A precipitate forms when aqueous soluti…

1. Write a balanced molecular equation for the reaction of solid AgNO3 with aque

1. Write a balanced molecular equation for the reaction of solid AgNO3 with aqueous NaCl. Be sure to include the correct number of coefficients and the state of the species (aq, s…

1. Write a complete Java class that will create a 2D array of randomly generated

1. Write a complete Java class that will create a 2D array of randomly generated ints with dimensions of 5 rows and 10 columns. Print the values of each cell to a 5x10 table. (Not…

1. Write a function in MATLAB that minimizes a multi-dimensional problem using t

1. Write a function in MATLAB that minimizes a multi-dimensional problem using the steepest descent method (see section 6.2.1). The function should be called as: [x,iter,addl] = m…

1. Write a function mu] t(n, m) that takes two integers n and m as inputs and re

1. Write a function mu] t(n, m) that takes two integers n and m as inputs and returns the product of those integers. To force you to use recursion, you may not use the multiplicat…