Chemistry concepts and calculations
117302 questions • Page 156 / 2347
1. When a solution is diluted, does the following increase, decrease, or remain
1. When a solution is diluted, does the following increase, decrease, or remain unchanged? a. The mass of solute b. The moles of solute c. The volume of solution d. The concentrat…
1. When actively respiring mitochondria are treated with the drug myxothiazole (
1. When actively respiring mitochondria are treated with the drug myxothiazole (shown below), the ratio of the cytochrome c1 (Fe3+)/cytochrome c1 (Fe2+) and the …
1. When adding the sodium borohydride solution to the vanillin solution, why are
1. When adding the sodium borohydride solution to the vanillin solution, why are you told to do so in a dropwise fashion? -So you don't accidentally spill any sodium borohydride -…
1. When an \"&\" appears at the left of a variable (e.g., &num), it (Points : 5)
1. When an "&" appears at the left of a variable (e.g., &num), it (Points : 5) indicates the beginning of a conditional operator expression indicates the end…
1. When an alkene undergoes oxymercuration-demercuration, the reaction proceeds
1. When an alkene undergoes oxymercuration-demercuration, the reaction proceeds with A) Markovnikov orientation and syn addition. B) anti-Markovnikov orientation and syn addition.…
1. When an open-end manometer is attached to a tank of gas in which the pressure
1. When an open-end manometer is attached to a tank of gas in which the pressure is 1.030 atm which of the following will be observed if the barometric pressure is 0.980 atm? (Con…
1. When answering the following questions draw i.e. make use of the structures o
1. When answering the following questions draw i.e. make use of the structures of benzoic acid and ethyl-4-aminobenzoate which are presented on page 15 of the textbook ( A miscros…
1. When caffeine is treated with HCl what solvent is the resulting compound more
1.When caffeine is treated with HCl what solvent is the resulting compound more soluble in? a.water b.none of the above c.methylene chloride d.chloroform 2.When a carboxylic acid …
1. When considering the thermal properties of food, The specific heat of food ca
1. When considering the thermal properties of food, The specific heat of food can be estimated using a weighted average of its relative volumes of water, ash, fat, protein, and ca…
1. When creating a report in Access what report tool best outlines the following
1. When creating a report in Access what report tool best outlines the following description: This report tool asks a series of questions and helps the designer create a report mo…
1. When crotyl chloride is treated with sodium iodide in acetone, it reacts much
1. When crotyl chloride is treated with sodium iodide in acetone, it reacts much faster than n-butyl chloride, even though both are primary alkyl halides. Explain the rate differe…
1. When doing a recrystallization, what observations wouldprompt you to perform
1. When doing a recrystallization, what observations wouldprompt you to perform a hot filtration? 2. What problems might arise if a hot solution is filtered byvaccum foltration? 3…
1. When doing gas law problems, we always use the ____________ temperature scale
1. When doing gas law problems, we always use the ____________ temperature scale. 2. -42oC equals _______ K. 3. If I dissolve one teaspoon of sugar in a glass of water, the solute…
1. When doing gas law problems, we always use the temperature scale. 2. -32 degr
1. When doing gas law problems, we always use the temperature scale. 2. -32 degree C equals K. 3. If I dissolve one teaspoon of sugar in a glass of water. the solute is the 4. The…
1. When ferric sulfide is roasted in oxygen, solid ferric oxide and sulfur dioxi
1. When ferric sulfide is roasted in oxygen, solid ferric oxide and sulfur dioxide gas are formed. Write out the balanced chemical reaction for the roasting. How many liters of pu…
1. When filling a hot air balloon, the air inside the balloon is heated from 20°
1. When filling a hot air balloon, the air inside the balloon is heated from 20°C to 99°C at constant atmospheric pressure (1.00 atm). The hot air expands from its initial volume …
1. When forming ions, metals typically do which of the following? lose electrons
1. When forming ions, metals typically do which of the following? lose electrons to form negatively charged ions gain protons to form cations gain electrons to form anions lose el…
1. When heated, calcium carbonate decomposes to yield calcium oxide and carbon d
1. When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction CaCO3(s)CaO(s)+CO2(g) What is the mass of calcium carbonate needed to p…
1. When heated, calcium carbonate gives off CO2 according to the following react
1. When heated, calcium carbonate gives off CO2 according to the following reaction: CaCO3(s) CO2(g) + CaO(s) You perform this reaction in lab by heating a test tube containing Ca…
1. When is it essential that a class have to define a destructor in C++ class an
1. When is it essential that a class have to define a destructor in C++ class and why? 2. Why should data members of a class be private? 3. Given an efficient circular array-based…
1. When light behaves like a wave, the equation c = is used. a) Name each variab
1. When light behaves like a wave, the equation c = is used. a) Name each variable in the equation. b) What are the units of each variable? c) The equation above can be rearranged…
1. When mixing particles with different polarity, it is not always possible for
1. When mixing particles with different polarity, it is not always possible for them to become more dispersed (achieve a higher disorder/entropy state). A) True B) False 2. Attach…
1. When monitoring the reaction by TLC you see that the most benzaldehyde starti
1. When monitoring the reaction by TLC you see that the most benzaldehyde starting material has an Rf of 0.25. What should you do? a. Use a greater amount of Ethyl Acetate in rela…
1. When monitoring the reaction by TLC you see that the most benzaldehyde starti
1. When monitoring the reaction by TLC you see that the most benzaldehyde starting material has an Rf of 0.25. What should you do? a. Use a greater amount of Ethyl Acetate in rela…
1. When preparing a mixture to be added to a column for chromatographic separati
1. When preparing a mixture to be added to a column for chromatographic separation, it is important to add the mixture as a very concentrated solution. Why? (be sure your answer i…
1. When reporting the results of replicate analytical measurements three pieces
1. When reporting the results of replicate analytical measurements three pieces of information are required. Wh ONE of the following is NOT one of those? A. An indication of the p…
1. When should a pointer parameter p be a reference parameter? A. When the funct
1. When should a pointer parameter p be a reference parameter? A. When the function changes p, and you want the change to affect the actual pointer argument. B. When the function …
1. When should we use a call by reference parameter? Call by value or call by re
1. When should we use a call by reference parameter? Call by value or call by reference is only a matter of preference. You may use whichever and they are always the same. …
1. When solid lead(II) sulfide ore burns in oxygen gas, the products are solid l
1. When solid lead(II) sulfide ore burns in oxygen gas, the products are solid lead(II) oxide and sulfur dioxide gas 2PbS(s)+3O2(g)2PbO(s)+2SO2(g) A.How many grams of oxygen are r…
1. When sugar dissolves in water: ion-dipole forces in the solute are broken and
1. When sugar dissolves in water: ion-dipole forces in the solute are broken and new intermolecular forces in the solution are formed intermolecular forces in the solute are broke…
1. When taking a melting point, why is it important that the the temperature doe
1. When taking a melting point, why is it important that the the temperature does not rise too rapidly? Choose as many that apply …
1. When the following equation is balanced properly under basic conditions, what
1. When the following equation is balanced properly under basic conditions, what are the coefficients of the species shown? _____Br2 + ______N2H4--------> ______BrO3- + _______…
1. When the reaction below proceeds in the forward direction, which ONE statemen
1. When the reaction below proceeds in the forward direction, which ONE statement is true? Fe (ag)+Cofs) Fe (oq)+Co2(aq) A) Fe (aq) is oxidized and Co(s) is reduced. B) Fe (aq) is…
1. When the temperature of a lake increases in the summer, how does this change
1. When the temperature of a lake increases in the summer, how does this change the solubility of oxygen and nitrogen in the lake water compared to their solubility in the winter …
1. When water leaves a water treatment plant and enters the distribution system
1. When water leaves a water treatment plant and enters the distribution system that transports it to homes and other users the water often contains a small chlorine residual* to …
1. When we mix water and strong acid, the order of adding should be like \"acid
1. When we mix water and strong acid, the order of adding should be like "acid TO water". What if two strong acids are mixed? such as nitric acid and sulfuric acid? What is the or…
1. When you calculated k in the rate equation for the reaction of KMnO, solution
1. When you calculated k in the rate equation for the reaction of KMnO, solution and HO, solution, you assumed k had the same value under the conditions of determinations 1, 2, an…
1. When you calculated k in the rate equation for the reaction of KMnO, solution
1. When you calculated k in the rate equation for the reaction of KMnO, solution and HO, solution, you assumed k had the same value under the conditions of determinations 1, 2, an…
1. When you did the 9 Bottles experiment in General Chemistry 1, explain why you
1. When you did the 9 Bottles experiment in General Chemistry 1, explain why you did not observe a precipitate when you mixed equal volumes of 0.01 M BaCl2 is mixed with 0.1 M Pb(…
1. When you place objects in order beginning with the object with the highest va
1. When you place objects in order beginning with the object with the highest value, you are sorting in order. a. acquiescing b. ascending c. demeaning d. descending 2. Using a bu…
1. Wher NaSCN solutions in this experiment, a student mistak FeNCS2 ion solution
1. Wher NaSCN solutions in this experiment, a student mistak FeNCS2 ion solution be higher, lower, or unafected enly used a graduated cylinder instead of volumetric therewere fing…
1. Where is the position of equilibrium for reactions with thefollowing equilibr
1. Where is the position of equilibrium for reactions with thefollowing equilibrium constants? a. 500 at 80oC b. 1.2 x 10-2 @20oC c. 6.5 x 103 @25oC d. 0.247 at 100oC …
1. Where is the position of equilibrium for reactions with thefollowing equilibr
1. Where is the position of equilibrium for reactions with thefollowing equilibrium constants? a. 500 at 80oC b. 1.2 x 10-2 @20oC c. 6.5 x 103 @25oC d. 0.247 at 100oC …
1. Which 0.100 Molar aqueous solution at 25.00 o C will have the highest freezin
1. Which 0.100 Molar aqueous solution at 25.00 oC will have the highest freezing point? Select one: a. sodium chloride b. glucose c. magnesium nitrate d. Aluminum bromide e. ammon…
1. Which Base is stronger, the conjugate base of methane or the conjugate base o
1. Which Base is stronger, the conjugate base of methane or the conjugate base of ethane? 2. Is sodium ethoxide( NaOCH2CH3) a strong enough base to deprotonate acetylene? 3. Is so…
1. Which amino acid does not have a chiral center? a) glycine b) alanine c) thre
1. Which amino acid does not have a chiral center? a) glycine b) alanine c) threonine d) histidine e) asparagine 2. At pH = 6.9, which phosphates would be predominant (For HP04, p…
1. Which amino acid does not have a chiral center? a) glycine b) alanine c) thre
1. Which amino acid does not have a chiral center? a) glycine b) alanine c) threonine d) histidine e) asparagine 2. At pH = 6.9, which phosphates would be predominant (For HP04, p…
1. Which answer is a true statement about pH values? a. A high pH value correspo
1. Which answer is a true statement about pH values? a. A high pH value corresponds to a high H+ concentration b. Stomach acid has a high pH value. c. none of the above. d. Pure w…
1. Which aqueous solution has the highest boiling point? a. 0.20 M NaCl b. 0.10
1. Which aqueous solution has the highest boiling point? a. 0.20 M NaCl b. 0.10 M CaCl2 c. 0.1 M Ga2(SO4)3 d. 0.2 M C6H12O6 2. True or false: One mole of MgCl2, in solution, will …
1. Which choice CORRECTLY lists the molecular masses from smallest to largest? S
1. Which choice CORRECTLY lists the molecular masses from smallest to largest? Select one: A. 1.8 mDa < 15,000 Da < 15,100 amu <18 kDa < 1.8 MDa B. 18 kDa < 15,000 …
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