Chemistry concepts and calculations
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When uploading pictures to Wikimedia Commons, I usually use the online Upload Wi
When uploading pictures to Wikimedia Commons, I usually use the online Upload Wizard, but it has several problems: You have to select files using your browser's file selection dia…
When using (Thunderbird and) GnuPG to send a PGP/MIME message to two separate re
When using (Thunderbird and) GnuPG to send a PGP/MIME message to two separate recipients, with the text body different in both messages, but the same file attached to both of them…
When using Excel to plot experimental data in this course, what type of plot is
When using Excel to plot experimental data in this course, what type of plot is desired Line plot Bar plot Pie plot Scatter plot Boiling point, melting point, color, and odor are …
When using PGP type public encrypted communication, would it be a good idea to g
When using PGP type public encrypted communication, would it be a good idea to generate a new public for each message and attach that in the new public key in the reply to back to…
When using a \"good\", modern cipher (specifically one that provides ciphertext
When using a "good", modern cipher (specifically one that provides ciphertext indistinguishability), is it a problem at all if there is some well-known structure in all plaintexts…
When using a personal computer, it can be easy to determine when a job is caught
When using a personal computer, it can be easy to determine when a job is caught in an infinite loop or system-wide freeze. The typical solution to this problem is for the user to…
When using a solvent mixture for recrystallization, how can you obtain the corre
When using a solvent mixture for recrystallization, how can you obtain the correct mixture? a. use an equal mix of the solvents b. dissolve the compound in the poorer solvent and …
When using a volumetric flask, which of the following are true? (Select all that
When using a volumetric flask, which of the following are true? (Select all that apply.) If any solute is lost in transfer, the concentration of the resulting solution will be low…
When using an internal standard analysis, it’s important to demonstrate that the
When using an internal standard analysis, it’s important to demonstrate that the response factor is constant across a range of analyte concentrations. The chemical contaminant nap…
When using dichloromethane as a solvent, which would make a good, yet cost effec
When using dichloromethane as a solvent, which would make a good, yet cost effective, drying agent? calcium sulfate? Silica gel? Ethyl alcohol? Acetone? Potassium Chlori…
When using the Claussius Clapeyron to solve for vapor pressure and calculating t
When using the Claussius Clapeyron to solve for vapor pressure and calculating temp. I don't understand the steps. Can you break down each step? I'm confused when I should convert…
When using the Switch statement, is using return instead of break or a combinati
When using the Switch statement, is using return instead of break or a combination of the two considered bad form? while (true) { var operation = Randomness.Next(0, 3); sw…
When vinegar is added to a solution of sodium bicarbonate, the mixture immediate
When vinegar is added to a solution of sodium bicarbonate, the mixture immediately begins to bubble furiously. As time passes, however, there is less and less bubbling. Part A Exp…
When voltage-gated potassium channels open, potassium ions move out of the cell
When voltage-gated potassium channels open, potassium ions move out of the cell restoring the resting membrane potential. The action potential triggers the opening of sodium chann…
When water boils, small bubbles form at the bottom and get larger as they rise.
When water boils, small bubbles form at the bottom and get larger as they rise. Bubbles get larger due to the decreasing pressure exerted on them by the water as they rise. The ab…
When water dissociates, what occurs? 1. The water separates from the oils. 2. Th
When water dissociates, what occurs? 1. The water separates from the oils. 2. There is a decrease in the number of H+ ions. 3. Hydrogen bonds are broken. 4. A polar covalent bond …
When water dissociates, what occurs? 1. The water separates from the oils. 2. Th
When water dissociates, what occurs? 1. The water separates from the oils. 2. There is a decrease in the number of H+ ions. 3. Hydrogen bonds are broken. 4. A polar covalent bond …
When water is added to a mixture Na_2O_2(s) and S(s), a redox reaction occurs, a
When water is added to a mixture Na_2O_2(s) and S(s), a redox reaction occurs, as represented by the equation below. 2NaO_2(s) + 2 H_2O(l) rightarrow 4 NaOH (aq) + SO_2(aq) Delta …
When water is in the liquid state, some of the water molecules will have enough
When water is in the liquid state, some of the water molecules will have enough kinetic energy to escape from the surface of the water in the form of water vapor (gas). The pressu…
When water was added to the anhydrate of CuSO_4(s), did the reaction proceed in
When water was added to the anhydrate of CuSO_4(s), did the reaction proceed in the direction of the reactants or products? Reaction of Copper (II) Ion and Hydroxide In test tube …
When water-cooled condensers are used for distillation or for refluxing a liquid
When water-cooled condensers are used for distillation or for refluxing a liquid, the water enters the condenser at the lowest point (i.e., water in) and leaves al the highest (i.…
When we calculate how much energy is needed to break a chemical bond, it makes a
When we calculate how much energy is needed to break a chemical bond, it makes a difference if we are talking about a single molecule in a vacuum, or lots of molecules contained i…
When we come to the end of an ATP accounting problem for a fatty acid we have to
When we come to the end of an ATP accounting problem for a fatty acid we have to subtract 2 ATP equivalents. Why is that? A. Two ATP molecules are consumed in the activation of a …
When we go smaller distances the nuclear force between the nucleons is extremely
When we go smaller distances the nuclear force between the nucleons is extremely strong. The binding operation is done by the protons which will bind to the neutrons and keep the …
When we look at the Actor Model and Communicating Sequential Processes we see th
When we look at the Actor Model and Communicating Sequential Processes we see that they are both trying to do concurrency based on message passing, yet they are distinct. (We see …
When we look at the fate of metals in the environment, the solubility of the met
When we look at the fate of metals in the environment, the solubility of the metal often depends on it’s valence. Consider Fe2+ and Fe3+. Calculate and compare the activity of aqu…
When we looked at assigning the electrons in nitrogen to sites in the 2s and 2p
When we looked at assigning the electrons in nitrogen to sites in the 2s and 2p orbitals, we used the 2s anti-bonding site. Which statement about this site is not true? A) This an…
When we looked at assigning the electrons in nitrogen to sites in the 2s and 2p
When we looked at assigning the electrons in nitrogen to sites in the 2s and 2p orbitals, we used the 2s anti-bonding site. Which statement about this site is not true? A) This an…
When we looked at assigning the electrons in nitrogen to sites in the 2s and 2p
When we looked at assigning the electrons in nitrogen to sites in the 2s and 2p orbitals, we used the 2s anti-bonding site. Which statement about this site is not true? When we lo…
When we place the thermometer in thermal contact with a block of ice we measure
When we place the thermometer in thermal contact with a block of ice we measure a pressure of 2.24 atm. We associate this pressure with a temperature of 0 degrees Centigrade (C). …
When we place the thermometer in thermal contact with a block of ice we measure
When we place the thermometer in thermal contact with a block of ice we measure a pressure of 2.24 atm. We associate this pressure with a temperature of 0 degrees Centigrade (C). …
When we purchase a bottle of liquor such as whiskey or gin, we often talk about
When we purchase a bottle of liquor such as whiskey or gin, we often talk about "proof". (For example "30 proof" alcohol). What is the relationship between the proof and the perce…
When we say that aprocess occurred at constant pressure (p=const), we realy mean
When we say that aprocess occurred at constant pressure (p=const), we realy meanthat p = pex =const was maintained throughout theprocess When we say that aprocess occurred at cons…
When we started our application we had the choice of going with the traditional
When we started our application we had the choice of going with the traditional MS-SQL normalized database or with a NoSQL database (RavenDB is what we tried out). Here is a simpl…
When we study chemical bonding, why are we concerned mostly with the valence ele
When we study chemical bonding, why are we concerned mostly with the valence electrons of the atoms? What does a Lewis dot symbol consist of? Use Lewis dot symbols to show the for…
When will net acceleration be equal to zero (no change in speed or direction) on
When will net acceleration be equal to zero (no change in speed or direction) on a moving air parcel? When forces acting on it are balanced When forces acting on it are not balanc…
When wine is served in a restaurant, the waiter often allows the host (the perso
When wine is served in a restaurant, the waiter often allows the host (the person who pays the bill) to examine the cork and gives the host a small sample of the wine before servi…
When wine is served in a restaurant, the waiter often allows the host (the perso
When wine is served in a restaurant, the waiter often allows the host (the person who pays the bill) to examine the cork and gives the host a small sample of the wine before servi…
When work is done hy a system and no heat is added, the temperature of the syste
When work is done hy a system and no heat is added, the temperature of the systerm A) decreases 8) semains unchanged C) increases 12) Two solutions, 250.0 ml of 1,00 M Caping and …
When working on a website application, me and a friend asked a security expert (
When working on a website application, me and a friend asked a security expert (works at IBM) how to handle storing passwords. After hours of google searches (resulting in hours o…
When working with a resource-based site (such as an MVC application or REST serv
When working with a resource-based site (such as an MVC application or REST service), we have two main options when a client tries to GET a resource that they don't have access to…
When working with a sequence of data with a lot of variation, such as the averag
When working with a sequence of data with a lot of variation, such as the average temperature over a number of days, it is often useful to find the well-defined peaks in the data …
When working with a single object there are a number of ways to segregate interf
When working with a single object there are a number of ways to segregate interfaces to it. Breaking it into smaller components that can be treated independently. Breaking it into…
When writing JavaScript (especially in node.js), I tend to use plain functions a
When writing JavaScript (especially in node.js), I tend to use plain functions and callbacks. However, sometimes there's some context to share between some functions and I don't l…
When writing a complete electron configuration, you write the filled sublevels i
When writing a complete electron configuration, you write the filled sublevels in order first, and then if there is a partially filled sublevel, you write it last in the sequence.…
When writing non-member, free functions, can they be placed in the global namesp
When writing non-member, free functions, can they be placed in the global namespace so long as the signature specifies a namespace-scoped object? For example, in the code below, i…
When writing software for yourself, your company or third parties, do you always
When writing software for yourself, your company or third parties, do you always consider certain principles, values, standards, or rules of behavior that guide the decisions, pro…
When writing your solutions, add occasional phrases or sentences to describe you
When writing your solutions, add occasional phrases or sentences to describe your thought process. This will help me to assign partial credit. Acrylonitrile is produced by reading…
When you add 0.401 g of sodium metal to an excess of hydrochloric acid, you find
When you add 0.401 g of sodium metal to an excess of hydrochloric acid, you find that 4170 J of heat are produced. What is the enthalpy of the reaction as written below. 2Na(s) + …
When you add a controlled amount of substance known as an impurity to a pure sem
When you add a controlled amount of substance known as an impurity to a pure semiconductor, its conductivity increases. This process is known as doping. The addition of an impurit…
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