Chemistry concepts and calculations
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When one-half mole of oxygen and one-half mole of nitrogen are heated to 3000 K
When one-half mole of oxygen and one-half mole of nitrogen are heated to 3000 K at a pressure of 5000 kPa, some of the mixture will react to form NO by the reaction equation! O^2 …
When ones goes into a public space, like a train or plane, how does one prevent
When ones goes into a public space, like a train or plane, how does one prevent their previously joined SSIDs from being broadcast? I noticed that my phone and tablet tend to try …
When operation of a distillation column begins, vapor is generated at the bottom
When operation of a distillation column begins, vapor is generated at the bottom of the column, flows upward through the column, and leaves the top of the column to be condensed i…
When our application doesn\'t work the way we expect it to (e.g. throws exceptio
When our application doesn't work the way we expect it to (e.g. throws exceptions etc.), I usually insert a lot of debug code at certain points in the application in order to get …
When our sun eventually runs out of fuel, its core will collapse leaving a conde
When our sun eventually runs out of fuel, its core will collapse leaving a condensed white dwarf star about the size of the Earth. Assume that 60% of the solar mass will be retain…
When oxygen gas dissolved in water reacts with the lead, it will form a solid le
When oxygen gas dissolved in water reacts with the lead, it will form a solid lead hydroxide. What type of reaction is this? Write a balanced chemical equation for this reaction. …
When performing a Grignard reaction it is important that air is excluded from th
When performing a Grignard reaction it is important that air is excluded from the reaction vessel. a. Draw the competing overall reactions that will occur with your Grignard reage…
When performing a Grignard reaction it is important that air is excluded from th
When performing a Grignard reaction it is important that air is excluded from the reaction vessel. a. Draw the competing overall reactions that will occur with your Grignard reage…
When performing a melting point on a solid compound, 2 melting point determinati
When performing a melting point on a solid compound, 2 melting point determinations were made on this compound. One sample, which was 1 mm in height in the capillary, possessed a …
When performing a titration by adding a NaOH solution to a KHP solution (as in P
When performing a titration by adding a NaOH solution to a KHP solution (as in Part B of the experiment), what marks the endpoint of the titration? when the indicator changes from…
When performing acid-base titrations, the first step is often a standardization
When performing acid-base titrations, the first step is often a standardization of the titrant, which is an accurate Determination of its concentration. Acidic titrants might be s…
When performing acid-base titrations, the first step is often a standardization
When performing acid-base titrations, the first step is often a standardization of the titrant, which is an accurate determination of its concentration. Acidic titrants might be s…
When performing acid-base titrations, the first step is often a standardization
When performing acid-base titrations, the first step is often a standardization of the titrant, which is an accurate determination of its concentration. Acidic titrants might be s…
When performing acid-base titrations, the first step is often a standardization
When performing acid-base titrations, the first step is often a standardization of the titrant, which is an accurate determination of its concentration. Acidic titrants might be s…
When performing an extraction how should the volume of extraction solvent relate
When performing an extraction how should the volume of extraction solvent relate to the volume of the liquid being extracted? A) Usually about twice the volume of extractino solve…
When performing extractions it is often better to do multiple extractions rather
When performing extractions it is often better to do multiple extractions rather than one large volume extraction. (See pg. 70-71 of Mayo) Suppose you have 100mg of a sample disso…
When performing part 2 of this lab a group of students forgot to place the test
When performing part 2 of this lab a group of students forgot to place the test tubes Into the cold-water bath for 10 min before starting the reaction. Only after adding persulfat…
When performing this experiment, some students tend to do less pre-laboratory pr
When performing this experiment, some students tend to do less pre-laboratory preparation than others. What useful advice would you give to a student who has been asked to perform…
When performing this experiment, some students tend to do less pre-laboratory pr
When performing this experiment, some students tend to do less pre-laboratory preparation than others. What useful advice would you give to a student who has been asked to perform…
When performing this experiment, why is it important that you use distilled wate
When performing this experiment, why is it important that you use distilled water instead of tap water in the preparation of your cereal sample? Do you think you could use the sam…
When performing titrations, good technique includes: (select all correct answers
When performing titrations, good technique includes: (select all correct answers) En faisant des titrages, il est mieux de: (sélectionnez toutes les réponses correctes) Question o…
When performing today\'s lab, you measure the temperature of the lab during the
When performing today's lab, you measure the temperature of the lab during the calibration of the graduated cylinder. You record the temperature as 2 degrees lower than it actuall…
When performing vacuum filtration to isolate a solid, why: -is the vacuum line b
When performing vacuum filtration to isolate a solid, why: -is the vacuum line broken before the water aspirator is turned off? When performing vacuum filtration to isolate a soli…
When performing vacuum filtration to isolate a solid, why: -is the vacuum line b
When performing vacuum filtration to isolate a solid, why: -is the vacuum line broken before the water aspirator is turned off? When performing vacuum filtration to isolate a soli…
When peroxide A is heated to 60 degree C in an inert solvent, it decomposes by a
When peroxide A is heated to 60 degree C in an inert solvent, it decomposes by a first-order process. An initial concentration of 5.0 mmol/liter of peroxide changes to 4.0 mmol/li…
When phosphorus reacts with chlorine, phosphorus trichloride is formed according
When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the equation: ___P4(s) + ___Cl2(g)? ___PCl3(l) (unbalanced) Balance the equation and determine …
When phosphorus reacts with chlorine, phosphorus trichloride is formed according
When phosphorus reacts with chlorine, phosphorus trichloride is formed according to the equation: ___P4(s) + ___Cl2(g)? ___PCl3(l) (unbalanced) Balance the equation and determine …
When potassium fluoride forms from a potassium(K) atom and a fluorine(F) atom a
When potassium fluoride forms from a potassium(K) atom and a fluorine(F) atom a proton is transferred from the fluorine atom to the potassium atom. an electron is transferred from…
When potassium forms a compound with iodine, one electron is transferred from th
When potassium forms a compound with iodine, one electron is transferred from the atom to the atom. What type of bonding exists between the potassium and the iodine? What is the e…
When potassium nitrate is dissolved in water, the resulting solution feels cool
When potassium nitrate is dissolved in water, the resulting solution feels cool to the touch. This means that: Answer the strength of attraction between the solute particles is g…
When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc su
When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc sulfide forms: Zn(s) + S8(s) rightarrow ZnS(s) [unbalanced] When 85.2 g of Zn reacts with 52.4 g of S…
When preparing . 0.500 M solution of Manganese Sulfate Monohyrate. you accidentl
When preparing . 0.500 M solution of Manganese Sulfate Monohyrate. you accidently tetri hydrate form Explain what effect this has on your final concentration revive .o sou, uree. …
When preparing an SDS-PAGE, a) Two gels are prepared independently and one gel i
When preparing an SDS-PAGE, a) Two gels are prepared independently and one gel is casted on top of the other. Name the gel that is casted on the bottom. (2pts) b) Name the gel tha…
When programming in ASP.NET, you can get very quick, effective functionality out
When programming in ASP.NET, you can get very quick, effective functionality out of using DataBound controls (GridView, FormView, etc) with an SQLDataSource control on the page (I…
When propane (C3Hs) burns, it reacts with oxygen gas to produce carbon dioxide a
When propane (C3Hs) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reaction is C3H8 (g) + O2(g) CO2(g) + H2O(g) This type o…
When propane gas (C3H8, used for gas barbecue) combusts in air, several differen
When propane gas (C3H8, used for gas barbecue) combusts in air, several different products can form based on how much oxygen is available. Consider each statement below and choose…
When propanol (CH3CH2CH2OH) is combusted, such as when in a gasoline blend, the
When propanol (CH3CH2CH2OH) is combusted, such as when in a gasoline blend, the following reaction occurs: 2CH3CH2CH2OH (l) +9O2 (g) = 6CO2 (g) + 8H2O (g) Based on standard free e…
When propylbenzene reacts with tert-butylhypochlorite three monochlorinated prod
When propylbenzene reacts with tert-butylhypochlorite three monochlorinated products are formed in the ratios 65%,25%,10%. Calculate a reactivity order for each type of hydrogen a…
When propylbenzene reacts with tert-butylhypochlorite three monochlorinated prod
When propylbenzene reacts with tert-butylhypochlorite three monochlorinated products are formed in the ratios 65%,25%,10%. Calculate a reactivity order for each type of hydrogen a…
When pure alpha-D-galactopyranose is placed in a plane polarimeter it rotates pl
When pure alpha-D-galactopyranose is placed in a plane polarimeter it rotates plane-polarized light +150.7 degrees. The pure beta-anomer rotates plane polarized light to +52.8 deg…
When pure alpha-D-galactopyranose is placed in a plane polarimeter it rotates pl
When pure alpha-D-galactopyranose is placed in a plane polarimeter it rotates plane-polarized light +150.7 degrees. The pure beta-anomer rotates plane polarized light to +52.8 deg…
When pure sulfuric acid dissolves in water, a great deal of heat is given off. T
When pure sulfuric acid dissolves in water, a great deal of heat is given off. To measure it, 175 g of water was placed in a coffee cup calorimeter and chilled to 10 degrees C. Th…
When pure sulfuric acid dissolves in water, a great deal of heat is given off. T
When pure sulfuric acid dissolves in water, a great deal of heat is given off. To measure it, 175 g of water was placed in a coffee cup calorimeter and chilled to 10 degrees C. Th…
When pure sulfuric acid is dissolved in water, heat is evolved. In a laboratory
When pure sulfuric acid is dissolved in water, heat is evolved. In a laboratory experiment to measure the molar heat of solution of sulfuric acid, the following procedure was foll…
When pure sulphuric acid dissolves in water, a large amount of energy is release
When pure sulphuric acid dissolves in water, a large amount of energy is released. To measure it, 175 grams of water was placed in a coffee-cup calorimeter and chilled to 10.0C. T…
When pure water reaches a chemical equilibrium between whole water molecules and
When pure water reaches a chemical equilibrium between whole water molecules and dissociated ones, which of the following applies? 8. When pure water reaches a chemical equilibriu…
When pushing off of a pool wall, a swimmer exerts a force parallel to the length
When pushing off of a pool wall, a swimmer exerts a force parallel to the length of her femur, compressing it 4 x 10-5 m. The bone is equivalent to a uniform cylinder 36.0 cm long…
When pushing off of a pool wall, a swimmer exerts a force parallel to the length
When pushing off of a pool wall, a swimmer exerts a force parallel to the length of her femur, compressing it 3 105 m. The bone is equivalent to a uniform cylinder 36.0 cm long an…
When pyridine is treated with isopropyl chloride and an AICI_3 catalyst,: Substi
When pyridine is treated with isopropyl chloride and an AICI_3 catalyst,: Substitution occurs at the 2 and 4 positions on the ring Substitution occurs at the 3 position on the rin…
When pyruvate is the precursor for gluconeogenesis, a)lactate dehydrogenase supp
When pyruvate is the precursor for gluconeogenesis, a)lactate dehydrogenase supplies the NADH needed for gluconeogenesis. b)malate is used to carry electrons and supply NAD+ for t…
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