Chemistry concepts and calculations
117302 questions • Page 1999 / 2347
When conducting surveys, an Administrator might send an Enumerator to survey a R
When conducting surveys, an Administrator might send an Enumerator to survey a Respondent. For "sensitive" questions (e.g. about embarrassing behavior), the Respondent may be fine…
When conducting the Schiff\'s Test on a suspected aldehyde or ketone, a student
When conducting the Schiff's Test on a suspected aldehyde or ketone, a student expected to observe the purple color of a positive test. Rather than this happening, the student obs…
When considering a Carbon-Oxygen covalent bond in an organic molecule, where is
When considering a Carbon-Oxygen covalent bond in an organic molecule, where is the majority of the electron density located? A. There is no electron density in a covalent bond. B…
When considering gas kinetics, the formula for kinetic energy is very useful: KE
When considering gas kinetics, the formula for kinetic energy is very useful: KE = (.5)mV^2. Compare the following gases and determine which one has a larger kinetic energy if the…
When considering gas kinetics, the formula for kinetic energy is very useful: KE
When considering gas kinetics, the formula for kinetic energy is very useful: KE = (.5)mV?. a. Compare the following gases and determine which one has a larger kinetic energy if t…
When considering gas kinetics, the formula for kinetic energy is very useful: KE
When considering gas kinetics, the formula for kinetic energy is very useful: KE = (.5)mV^2. a. Compare the following gases and determine which one has a larger kinetic energy if …
When considering substitution and/or elimination reactions involving tertiary ha
When considering substitution and/or elimination reactions involving tertiary haloalkanes: (A) reaction via SN1 and E1 mechanisms only is possible. (B) a better nucleophile will i…
When considering the Ideal Gas equation of state, the molecules in the gas are a
When considering the Ideal Gas equation of state, the molecules in the gas are assumed to have no interaction with each other at all. In real gases, however, attractive intermolec…
When considering the Ideal Gas equation of state, the molecules in the gas are a
When considering the Ideal Gas equation of state, the molecules in the gas are assumed to have no interaction with each other at all. In real gases, however, attractive intermolec…
When considering the Ideal Gas equation of state, the molecules in the gas are a
When considering the Ideal Gas equation of state, the molecules in the gas are assumed to have no interaction with each other at all. In real gases, however, attractive intermole…
When considering the Ideal Gas equation of state, the molecules in the gas are a
When considering the Ideal Gas equation of state, the molecules in the gas are assumed to have no interaction with each other at all. In real gases, however, attractive intermole…
When considering the Ideal Gas equation of state, the molecules in the gas are a
When considering the Ideal Gas equation of state, the molecules in the gas are assumed to have no interaction with each other at all. In real gases, however, attractive intermolec…
When considering the gas laws, the Kelvin temperature scale must be used. The re
When considering the gas laws, the Kelvin temperature scale must be used. The reason for this is that the Kelvin scale is directly proportional to the Kinetic Energy of the paricl…
When converting 9-fluorenone to 9-fluorenol 1. Why was NMR used to determine the
When converting 9-fluorenone to 9-fluorenol 1. Why was NMR used to determine the ratio of the product/ starting material? 2 another Redusing agent will be NaCNBH3 would this be a …
When cooking pasta, salt is often added to boiling water before the pasta. When
When cooking pasta, salt is often added to boiling water before the pasta. When the salt is added, boiling ceases because the boiling point of the salt water solution is higher th…
When cooking pasta, salt is often added to boiling water before the pasta. When
When cooking pasta, salt is often added to boiling water before the pasta. When the salt is added, boiling ceases because the boiling point of the salt-water solution is higher th…
When copper (II) chloride reacts with sodium nitrate, copper (II) nitrate and so
When copper (II) chloride reacts with sodium nitrate, copper (II) nitrate and sodium chloride are formed. Write the balanced equation for the reaction given above: If 15 grams of …
When copper (II) chloride reacts with sodium nitrate, copper (II) nitrate and so
When copper (II) chloride reacts with sodium nitrate, copper (II) nitrate and sodium chloride are formed. (a.) Write the balanced equation for the reaction given above: CuCl_2 + N…
When copying some content on a web page, it can happen that the clipboard contai
When copying some content on a web page, it can happen that the clipboard contains more than what is visibly selected. This is done for promotional reasons (e.g., an attribution l…
When creating AMD modules you can export whatever you like whether it be an obje
When creating AMD modules you can export whatever you like whether it be an object or a function. I vaguely recall reading a recommendation somewhere to export just one thing; the…
When creating a titration curve for a weak base, the pH of the initial solution
When creating a titration curve for a weak base, the pH of the initial solution requires setting up a table showing the initial, change, and equilibrium values for each species an…
When creating an image slider, using a cross fade is one of more popular effects
When creating an image slider, using a cross fade is one of more popular effects. Various sliders use differing techniques to create such an effect. Major techniques I've found so…
When creating template classes in C++, if the type upon which the template will
When creating template classes in C++, if the type upon which the template will be specialized is intended to be a shared_ptr type, is it better to make T a shared_ptr type or mak…
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide ga
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned. A) Write the balance…
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide ga
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned. A) Write the balance…
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide ga
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned. A) Write the balance…
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide ga
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned. A) Write the balance…
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide ga
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned. A) Write the balance…
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide ga
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned. A) Write the balance…
When dealing with Asymmetric cryptographic algorithms, usually the sender of the
When dealing with Asymmetric cryptographic algorithms, usually the sender of the critical data asks the listener for a Public Key for encrypting the data and sending them. This is…
When dealing with a project that has many different files, I always seem to loos
When dealing with a project that has many different files, I always seem to loose track of how the parts interact with one another. I've never really had much of a problem underst…
When defining a Turing Machine formally, you enumerate its states. But I don\'t
When defining a Turing Machine formally, you enumerate its states. But I don't understand what states a TM can be in. Reading, Writing, and moving the head are the only ones that …
When describing the location of an electron on an atom, there are four quantum n
When describing the location of an electron on an atom, there are four quantum numbers, each of which give specific information: the principle quantum number (n), the angular mome…
When designing a valid experiment, the scientist has to control many variables s
When designing a valid experiment, the scientist has to control many variables so that only the one variable that is being tested changes from one trial to another. To do a valid …
When designing an interface for passing objects which are meant to be stored for
When designing an interface for passing objects which are meant to be stored for later use and which should not be 'null', I am always a bit uncertain if the argument should be pa…
When determining the gram molecular weight of a substance by a freezing point ex
When determining the gram molecular weight of a substance by a freezing point experiment, tell whether each of the follwing would caused the experimental value of the gram molecul…
When determining the rate of an enzyme-catalyzed reaction, why is it important t
When determining the rate of an enzyme-catalyzed reaction, why is it important to determine V0? A. In order to accurately determine the rate, it is best to measure and compare [P]…
When developing web apps you often build your app on top of some frameworks like
When developing web apps you often build your app on top of some frameworks like Twitter's bootstrap. These frameworks come with less/sass/stylus, javascript, images and sometimes…
When dissolved in water fructose and glucose exist in equilibrium. A chemist pre
When dissolved in water fructose and glucose exist in equilibrium. A chemist prepared a .244M solution of fructose. When equilibrium is reached its concentration had decreased to …
When dissolving a crude compound to be recrystallized, which of the following is
When dissolving a crude compound to be recrystallized, which of the following is true? As long as the solvent is hot, excess solvent can be added The solvent must be cold and the …
When doing an aqueous/ethereal \"work-up\" of the sodium borohydride reduction o
When doing an aqueous/ethereal "work-up" of the sodium borohydride reduction of 3, 3 dimethyl-2-butanone we did a number of washes with "brine" (saturated sodium chloride solution…
When doing single replacement reactions for metals. If A is greater in reactivit
When doing single replacement reactions for metals. If A is greater in reactivity then B there will be a reaction and if B is is greater than A then there is no reaction. Example …
When doing the kinetic trial , Susan forgot to include the deionized water. Will
When doing the kinetic trial , Susan forgot to include the deionized water. Will this omission hasten or delay the formation of the blue color in the trials (Exclusive of Trial 6)…
When drawing an arrow-pushing mechanism, the head of the arrow goes where? At th
When drawing an arrow-pushing mechanism, the head of the arrow goes where? At the bond that is being formed. At the bond that is being broken. At the source of electrons that is b…
When drawing an organic compound in 3-D, the solid wedge indicates _____________
When drawing an organic compound in 3-D, the solid wedge indicates __________________. the atom or group of atoms is in the same plane as the paper. Does not mean anything. the at…
When dynamic equilibrium is reached between a liquid and its vapor __________. A
When dynamic equilibrium is reached between a liquid and its vapor __________. A) the number of liquid and vapor molecules are equal B) vaporization and condensation cease C) the …
When each of the following pairs of aqueous solutions is mixed, does a precipita
When each of the following pairs of aqueous solutions is mixed, does a precipitation reaction occur? If so, write the formula and name of the precipitate. (Type your answer using …
When each of the following pairs of aqueous solutions is mixed, does a precipita
When each of the following pairs of aqueous solutions is mixed, does a precipitation reaction occur? If so, write the formula and name of the precipitate. (Type your answer using …
When each of the following pairs of aqueous solutions is mixed, does a precipita
When each of the following pairs of aqueous solutions is mixed, does a precipitation reaction occur? If so, write the formula and name of the precipitate. (Type your answer using …
When each of the following pairs of aqueous solutions is mixed, does a precipita
When each of the following pairs of aqueous solutions is mixed, does a precipitation reaction occur? If so, write the formula and name of the precipitate. (Type your answer using …
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