Chemistry concepts and calculations
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Why ISO/ANSI didn\'t standardize C++ at the binary level? There are many portabi
Why ISO/ANSI didn't standardize C++ at the binary level? There are many portability issues with C++, which is only because of lack of it's standardization at the binary level. Don…
Why Is radioisotope so dangerous List the items that you observed and indicate t
Why Is radioisotope so dangerous List the items that you observed and indicate the type of radiation that is being emitted. Watch Dial arrow 1495 cpm/99 mmg Coleman lantem mante a…
Why Select one or more O a. They are formed of molecules with a hydrophilic head
Why Select one or more O a. They are formed of molecules with a hydrophilic head and a hydrophobic tail O b. The heads of the molecules forming a micelle are hydrophilic because t…
Why am I getting 2 different answers with this thermodynamics question? There is
Why am I getting 2 different answers with this thermodynamics question? There is a sealed piston cylinder device that is adiabatic and has is at 150kPa pressure with a saturated w…
Why an evaluation of Turing machine efficiency is equal to the algorithm which i
Why an evaluation of Turing machine efficiency is equal to the algorithm which is implemented by this machine and vise versa? For example, we can say that efficiency of merge sort…
Why arc cooked pineapples useful to make gelatin dessert but fresh pineapples ar
Why arc cooked pineapples useful to make gelatin dessert but fresh pineapples are not? A. The heat reacts with the gelatin B. The heat melts the gelatin C. The heat denatures the …
Why are a few drops of trimethylamine added to the reaction (step 6) in this lab
Why are a few drops of trimethylamine added to the reaction (step 6) in this lab procedure? Obtain a 25 mL round bottom flask and place 5.0 g of methyl-alpha-D-glucopyranoside int…
Why are aldehydes more reactive than ketones toward nucleophilic attack Aldehyde
Why are aldehydes more reactive than ketones toward nucleophilic attack Aldehydes have a larger dipole moment Ketones have a higher molecular weight Aldehydes have an acidic proto…
Why are aldehydes more reactive towards nucleophiles than ketones? 2. It is not
Why are aldehydes more reactive towards nucleophiles than ketones? 2. It is not advisable to prepare and store tollens' reagent in advance for test described in this experiment wh…
Why are all three correct? Please show work!!! I dont understand this. The natur
Why are all three correct? Please show work!!! I dont understand this. The naturally occurring compound camphor (1) has long been respected for its medicinal properties. However, …
Why are alloys that second-row nonmetals (such as B, C, and N) form with transit
Why are alloys that second-row nonmetals (such as B, C, and N) form with transition metals more likely to be interstitial than substitutional? A) The second-row nonmetals are so l…
Why are atomic masses expressed in a relative atomic mass scale? A: atoms are el
Why are atomic masses expressed in a relative atomic mass scale? A: atoms are electrically positive B: atoms are electrically neutral C: atoms are too reactive to weigh directly D…
Why are atomic masses expressed in a relative atomic mass scale? A: atoms are el
Why are atomic masses expressed in a relative atomic mass scale? A: atoms are electrically positive B: atoms are electrically neutral C: atoms are too reactive to weigh directly D…
Why are beta -lactams, such as penicillins and cephalosporins, unusually reactiv
Why are beta-lactams, such as penicillins and cephalosporins, unusually reactive amides? Their enhanced reactivity is due to a radical chain mechanism. Their enhanced reactivity i…
Why are both the photon model and the electromagnetic wavemodel accepted today a
Why are both the photon model and the electromagnetic wavemodel accepted today as a single theory? because a photon does nothave wave properties sometimes light acts…
Why are complex ions are often coloured? All red light is absorbed by the ligand
Why are complex ions are often coloured? All red light is absorbed by the ligands in a complex ion due to the d orbitals and the resultant light is coloured. Light is absorbed whe…
Why are compounds of Ti(IV) colorless? Because Ti(IV) ions have an Ar]3d electro
Why are compounds of Ti(IV) colorless? Because Ti(IV) ions have an Ar]3d electron configuration there are no d - dtransitions that can absorb photons of visible light. Because Ti …
Why are cyclic conjugated dienes most reactive in Diels-Alder reaction? tandem b
Why are cyclic conjugated dienes most reactive in Diels-Alder reaction? tandem bicycles have gears that are never used the required s-cis geometry is intrinsic to their structure …
Why are different materials separated by chromatography? Each material is a diff
Why are different materials separated by chromatography? Each material is a different compound in the mixture Each material has a slightly different color than the others in the m…
Why are extra calories consumed as carbohydrates stored as fat and not as glycog
Why are extra calories consumed as carbohydrates stored as fat and not as glycogen? Why are extra calories consumed as carbohydrates stored as fat and not as glycogen? A. Calories…
Why are hydrogen bonds considered a special class of dipole-dipole interactions?
Why are hydrogen bonds considered a special class of dipole-dipole interactions? They are observed with all molecules that contain hydrogen. These interactions only occur if hydro…
Why are hydrogen bonds considered a special class of dipole-dipole interactions?
Why are hydrogen bonds considered a special class of dipole-dipole interactions? Choose one or more: A. They are observed with all molecules that contain only hydrogen and fluorin…
Why are intermolecular forces generally much weaker than bonding forces? What is
Why are intermolecular forces generally much weaker than bonding forces? What is capillary action? How does it depend on the relative strengths of adhesive and cohesive forces? Wa…
Why are material safety data sheets important? Select all appropriate answers A.
Why are material safety data sheets important? Select all appropriate answers A. They inform workers how to safely store the chemical B. They describe the chemical's intended use …
Why are my local function definitions illegal??? /* Axially Aligned Boxes: Write
Why are my local function definitions illegal??? /* Axially Aligned Boxes: Write a function that checks if given two axially aligned 2d-boxes (x,y) whether they intersect. You can…
Why are neural networks initial weights initialized as random numbers? I had rea
Why are neural networks initial weights initialized as random numbers? I had read somewhere that this is done to "break the symmetry" and this makes the neural network learn faste…
Why are nonpoint sources becoming a greater problem than point sources of pollut
Why are nonpoint sources becoming a greater problem than point sources of pollution? A- Regulation is possible only for nonpoint sources. B-While each nonpoint source releases rel…
Why are nuclear power plants not in danger of a nuclear explosion? They don\'t u
Why are nuclear power plants not in danger of a nuclear explosion? They don't use any nuclear material. The enrichment of uranium remains too low for an explosion. They don't tend…
Why are phenols more acidic than alcohols? What are the dominant products of the
Why are phenols more acidic than alcohols? What are the dominant products of the following reactions: phenol + sodium hydroxide rightarrow phenoxide + ethyl bromide rightarrow phe…
Why are polyamides such as nylon less flexible than analogous polyesters? A) Str
Why are polyamides such as nylon less flexible than analogous polyesters? A) Stronger ionic bonding B) Stronger hydrogen bonding C) Stronger covalent cross-linking D) Stronger dip…
Why are protons bound to alkene carbons especially deshielded? none of the above
Why are protons bound to alkene carbons especially deshielded? none of the above the alkene counts as two bonds to carbon, each of which is more electronegative than hydrogen sp2 …
Why are rates of different reactions often compared by observing the rate of the
Why are rates of different reactions often compared by observing the rate of the reaction at the early stages of the reaction? A) The change in concentration vs. change in time at…
Why are sodium chloride plates used to run IR spectra of nujol mulls? Tick all t
Why are sodium chloride plates used to run IR spectra of nujol mulls? Tick all that apply. Glass plates are more expensive than NaCl NaCl doesn't absorb in the IR region between 4…
Why are solutions of highly charged metal ions such as Cr 3+ normally acidic? po
Why are solutions of highly charged metal ions such as Cr3+ normally acidic? possible answer but please explain The hydrated ion Cr(H2O)63+ is a good proton acceptor. The hydrated…
Why are some elements more likely to be found as ions in nature? Also, as compou
Why are some elements more likely to be found as ions in nature? Also, as compounds become larger and more complex, will you always be able to determine the structural formula fro…
Why are the N, O, and C ALL sp2 hybridized here? At the top, N has 1 lone pair a
Why are the N, O, and C ALL sp2 hybridized here? At the top, N has 1 lone pair and 3 bonds, making it sp3 hybrized. In structure C, I understand HERE that the N is now sp2 hybridi…
Why are the noble gases not generally reactive? Select one: O a. They have a fil
Why are the noble gases not generally reactive? Select one: O a. They have a filled outer electron shell. O b. They have strong nuclear forces that prevent chemical reactions O c.…
Why are there bright spiral arms in the disk of the Milky Way? Bright stars are
Why are there bright spiral arms in the disk of the Milky Way? Bright stars are spread evenly throughout the disk, we just can't see them because most are blocked by thick clouds …
Why are these the answers This is my work Delta Sunivese = delta Ssys + delta Ss
Why are these the answers This is my work Delta Sunivese = delta Ssys + delta Ssur Delta G = Delta H - T delta Ssys The temperature decreses so, the reaction is endothermic meanin…
Why are we adjusting the pH of our sample? Why is a basic pH necessary? - What
Why are we adjusting the pH of our sample? Why is a basic pH necessary? - What is the difference between the ionized and un-ionized drugs? Which is most important for our extract…
Why are we performing each of the following four steps during the work-up of the
Why are we performing each of the following four steps during the work-up of the second synthesis (“Hydrogenation of a Chalcone”)? (What is the purpose of each step?) Please expla…
Why are we preparing a standard solution series? What will it be used to calcula
Why are we preparing a standard solution series? What will it be used to calculate? How many milliliters of a 1.30 M NaCl solution are needed to prepare 0.50 L of 0.10 M NaCl? Whe…
Why are we preparing a standard solution series? What will it be used to calcula
Why are we preparing a standard solution series? What will it be used to calculate? How many milliliters of a 1.30 M NaCl solution are needed to prepare 0.50 L of 0.10 M NaCl? Whe…
Why can a silver electrode be used as an indicator electrode for Ag^+ and halide
Why can a silver electrode be used as an indicator electrode for Ag^+ and halides? The silver electrode contains two membranes. One membrane contains a substance that reacts with …
Why can equilibrium calculations be simplified when K is very small, specificall
Why can equilibrium calculations be simplified when K is very small, specifically, why can -x be ignored on the reactants side? Because the -x represents a large enough change in …
Why can\'t John and Sue scuba dive and fly is an airplane on the same day? Expla
Why can't John and Sue scuba dive and fly is an airplane on the same day? Explain what might happen physically. What is the chemistry behind this as it relates to the gas laws? Ho…
Why can\'t hydrogen have more than 1 covalent bond? It is not electronegative en
Why can't hydrogen have more than 1 covalent bond? It is not electronegative enough It only forms +1 cations It only has 1 valence shell orbital Its larger than smallest atom The …
Why can\'t we see the de Broglie wavelength of everyday macroscopic objects (suc
Why can't we see the de Broglie wavelength of everyday macroscopic objects (such as a moving car or a thrown baseball)? The macroscopic objects are moving to quickly for the wavel…
Why can\'t you just measure the pH of a water sample to tell if it is susceptibl
Why can't you just measure the pH of a water sample to tell if it is susceptible to acid rain? How can you account for the differences in the ANC values between your samples (what…
Why can\'t you use pen to mark the chromatography paper in this experiment? 2.)
Why can't you use pen to mark the chromatography paper in this experiment? 2.) Why is it important to stop the chromatograph before the solvent reaches the top of the paper? What …
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