Chemistry concepts and calculations
117302 questions • Page 2067 / 2347
Why couldn\'t you substitute 3M H_2 SO_4 for concentrated HNO_3 in the transform
Why couldn't you substitute 3M H_2 SO_4 for concentrated HNO_3 in the transformation from Cu(s) to [Cu(H_2 O)_6]^2+? The necessary acid is the NO_3 ^- ion, which is not present in…
Why did I get this question wrong?? I don\'t understand why this is wrong, what
Why did I get this question wrong?? I don't understand why this is wrong, what is the correct answer here? To my eCampus - Blackboax Y to Texas A&M; University - C Chegg Study…
Why did the C master Dennis Ritchie introduce pointers in C? And why did the oth
Why did the C master Dennis Ritchie introduce pointers in C? And why did the other programming languages like VB.NET or Java or C# eliminate them? I have found some points in Goog…
Why did the switch to Flint\'s river water cause the water catastrophe? Because
Why did the switch to Flint's river water cause the water catastrophe? Because Flint's river water has a) high pH b) high alkalinity c) high solubility of Pb_3(PO)_2 d) high O_2 c…
Why did we need to add acid to the FAS in step B4? In step C4, where does the pa
Why did we need to add acid to the FAS in step B4? In step C4, where does the pale pink color from that shows the endpoint has been reached? Another common analysis for iron is ti…
Why did you only titrate the aqueous layer during the experiment? (my experiment
Why did you only titrate the aqueous layer during the experiment? (my experiment about the extraction) Could you have titrated the organic layer to figure out the distribution coe…
Why did you use a separatory funnel in today’s experiment? It served two functio
Why did you use a separatory funnel in today’s experiment? It served two functions. Why was saturated bicarbonate added to the separatory funnel? lab below SYNTHESIS OF TERTIARY B…
Why did you use a volumetric pipet for the addition of Na_2CO_3, but were able t
Why did you use a volumetric pipet for the addition of Na_2CO_3, but were able to use a graduated cylinder for the addition of CaCl_2? Sodium carbonate-also called washing soda-ca…
Why didn\'t you need to know the molar absorptivity of the equilibrium mixture o
Why didn't you need to know the molar absorptivity of the equilibrium mixture or the path length for the calculations you did in this experiment? For each determination of the %T,…
Why do Helium Balloons Float in the Air? Have you ever wondered why helium fille
Why do Helium Balloons Float in the Air? Have you ever wondered why helium filled balloons sold in stores float in the air, but the ones you blow air into do not, even though they…
Why do I not use the amount of C5H10 (2.4g) that was from the reaction that comb
Why do I not use the amount of C5H10 (2.4g) that was from the reaction that combusted in the constant-volume calorimeter? 210 AV to +50.2 J Io I. 3. Question a: 4 Combustion l'Yn …
Why do I, as a developer, have to go through so much trouble developing PDF down
Why do I, as a developer, have to go through so much trouble developing PDF download options for my clients when everyone in the world can simply hit Ctrl+P and life is good? The …
Why do a lot of password generators don\'t generate strong passwords including c
Why do a lot of password generators don't generate strong passwords including chinese, arabian...-characters? All generators I saw, also the included one in my password manager ke…
Why do aldehydes undergo nucleophilic addition reactions while acyl chlorides un
Why do aldehydes undergo nucleophilic addition reactions while acyl chlorides undergo nucleophilic acyl substitution reactions? A. The carbonyl carbon of the aldehyde is more elec…
Why do aldehydes undergo nucleophilic addition reactions while esters undergo nu
Why do aldehydes undergo nucleophilic addition reactions while esters undergo nucleophilic acyl substitution reaction? Select one Aldehydes are more sterically hindered than ester…
Why do atomic radi decrease from left to right across a period of the periodic t
Why do atomic radi decrease from left to right across a period of the periodic table? Atomic radili decrease from left to right across a period because the total number of electro…
Why do atomic radii decrease from left to right across a period of periodic tabl
Why do atomic radii decrease from left to right across a period of periodic table? Atomic radii decrease from left to right across a period because the total number of electrons o…
Why do books say, \"the compiler allocates space for variables in memory\". Isn\
Why do books say, "the compiler allocates space for variables in memory". Isn't it the executable which does that? I mean, for example, if I write the following program, #include …
Why do branched carbon isomers have higher heats of combustion than their linear
Why do branched carbon isomers have higher heats of combustion than their linear counterpart isomers? I know linear molecules have higher densities and boiling points because of i…
Why do crackers (high in amylose) have the potential to taste sweet after chewin
Why do crackers (high in amylose) have the potential to taste sweet after chewing in your mouth? Amylose is naturally sweet tasting. Amylose reacts with amylase in saliva and prod…
Why do firefighters recommend the use of a deluging volume of water when extingu
Why do firefighters recommend the use of a deluging volume of water when extinguishing an oxidizer-supported fire? What may happen to a large (i.e., 30-50lb) container of trichlor…
Why do iPP and PET show different behavior in phase transitions when they are he
Why do iPP and PET show different behavior in phase transitions when they are heating up in the DSC? Relate it to their molecular structure. What degree of crystallinity would you…
Why do ionic compounds dissolve well in water? Select all that are true. Questio
Why do ionic compounds dissolve well in water? Select all that are true. Question 5 options: Because water and ionic compounds are both polar Water molecules have partial charges …
Why do programmers even like the idea of open source? I am not talking about the
Why do programmers even like the idea of open source? I am not talking about the creators of those projects, of course they get fame, but I am talking about the industry in genera…
Why do reagents like NaOH and DCP need to be standardized before use? A Because
Why do reagents like NaOH and DCP need to be standardized before use? A Because they degrade over time and as a result, the concentration decreases. B Because they are used as sta…
Why do researcher need to control all C&C servers of a botnet? Wouldn\'t it be e
Why do researcher need to control all C&C servers of a botnet? Wouldn't it be easier to spread a deinstall command to all reachable PCs to cripple the botnet? This could be do…
Why do scientists study earthquakes to predict a volcanic eruption? Earthquakes
Why do scientists study earthquakes to predict a volcanic eruption? Earthquakes shake magma loose causing it to erupt Groundwater moves before an eruption, causing earthquakes Whe…
Why do sodium borohydride and lithium tri-sec-butylborohydride produce the resul
Why do sodium borohydride and lithium tri-sec-butylborohydride produce the results seen in the table on page 46? Sterically large hydric reducing agents are forced to make an equa…
Why do the coefficients of an elementary step equal the reaction orders of its r
Why do the coefficients of an elementary step equal the reaction orders of its rate law, but those of an overall reaction do not? a)Overall reactions are always in dynamic equilib…
Why do the effects of intermolecular forces on a gas become significant at lower
Why do the effects of intermolecular forces on a gas become significant at lower temperatures? Why do the effects of intermolecular forces on a gas become significant at lower tem…
Why do the non-polar tails of the fatty acid molecules project into the air abov
Why do the non-polar tails of the fatty acid molecules project into the air above the water surface? Choose all that apply. Steric acid is completely polar and will dissolve readi…
Why do the non-polar tails of the fatty acid molecules project into the air abov
Why do the non-polar tails of the fatty acid molecules project into the air above the water surface? Choose all that apply. Steric acid is completely polar and will dissolve readi…
Why do the planets revolve around the Sun in the same direction? That is the dir
Why do the planets revolve around the Sun in the same direction? That is the direction gravity is pulling them in. The planets are pulled into the same direction as Jupiter, the l…
Why do the premininary tests not help in theidentftificatin of nitrate and nitri
Why do the premininary tests not help in theidentftificatin of nitrate and nitrite? 2. A student analyzes a sample using the prelininarytests and finds that no precipitate is obta…
Why do the strengths of London (dispersion) forces generally increase with incre
Why do the strengths of London (dispersion) forces generally increase with increasing molecular size? Dispersion forces are all equal in magnitude; there is no size dependence. He…
Why do we add a boiling stone to the reflux vessel? A. To prevent superheated ar
Why do we add a boiling stone to the reflux vessel? A. To prevent superheated areas from instantly boiling ("bumping") B. To encourage crystallization of the final product C. To r…
Why do we need to include both the .h and .cpp files , while we can make it work
Why do we need to include both the .h and .cpp files , while we can make it works with making just a .cpp file and then including it . For example, Creating a file.h containing de…
Why do we not need to determine the exact volume of water needed to make the sol
Why do we not need to determine the exact volume of water needed to make the solution with the KHP in the standardization titration? What is the difference between the end point a…
Why do you add hydroxide to your hexanediamine solution? What would occur if you
Why do you add hydroxide to your hexanediamine solution? What would occur if you did not add it? 2. Under certain conditions, the carbon-oxygen bond of a carbonyl group takes part…
Why do you add the 6M hydrochloric acid to the reaction mixture from last week a
Why do you add the 6M hydrochloric acid to the reaction mixture from last week at the start of this weeks' lab? 6. (2 pts.) Why do you hold the separatory funnel with the stopcock…
Why does 50 g of water initially at 0 ?C warm more quickly than 50 g of an ice/w
Why does 50 g of water initially at 0 ?C warm more quickly than 50 g of an ice/water mixture initially at 0 ?C. Why does 50 of water initially at 0 warm more quickly than 50 of an…
Why does Al(OH3) not dissociate when more base is added? Al(OH)_3 is only slight
Why does Al(OH3) not dissociate when more base is added? Al(OH)_3 is only slightly soluble in water but dissolves readily in either acidic or basic solutions. Write balanced react…
Why does Molybdenum have a higher ionization energy thanChromium? I would think
Why does Molybdenum have a higher ionization energy thanChromium? I would think that Chromium has a higher energy since it hasless oribtals compared to Molybdenum and thus less sh…
Why does Na have a larger atomic radius than Mg? Na has more electrons than Mg.
Why does Na have a larger atomic radius than Mg? Na has more electrons than Mg. Mg has more electrons than Na. Mg has more protons and a higher effective nuclear charge than Na. N…
Why does OF2 have a single bond? Why not double bond? Wouldn\'t it be better to
Why does OF2 have a single bond? Why not double bond? Wouldn't it be better to use a double bond and then O wouldn't have a lone pair and F would have one lone pair less? How can …
Why does OF2 have a single bond? Why not double bond? Wouldn\'t it be better to
Why does OF2 have a single bond? Why not double bond? Wouldn't it be better to use a double bond and then O wouldn't have a lone pair and F would have one lone pair less? How can …
Why does a branched alkane have a lower boiling point than a normal alkane of th
Why does a branched alkane have a lower boiling point than a normal alkane of the same molar mass? Why do the strengths of London dispersion forces increase with increasing molecu…
Why does a crystalline version of a sample react more quickly than a powdered ve
Why does a crystalline version of a sample react more quickly than a powdered version of that same sample, even if the two have the same mass and number of reactive particles with…
Why does a negative value for the change in Gibbs free energy tell us whether or
Why does a negative value for the change in Gibbs free energy tell us whether or not a process will be spontaneous as written? a) because exothermic processes are usually spontane…
Why does a system in equilibrium appear, on a macroscopic level, as if no change
Why does a system in equilibrium appear, on a macroscopic level, as if no change is taking place? In the body, an equilibrium exists between calcium, phosphate ions, and calcium p…
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