Chemistry concepts and calculations

1.When a 8.192g sample of bluish-green crystals of hydrated nickel(II)sulfate is

1.When a 8.192g sample of bluish-green crystals of hydrated nickel(II)sulfate is heated, all of the water of hydration is lost leaving 4.826g of anhydrous nickel(II)sulfate. Write…

1.When a sample of 0.242 grams of an unknown substance containing chloride (Cl-)

1.When a sample of 0.242 grams of an unknown substance containing chloride (Cl-) was boiled and was analyzed and it was found to contain 0.084 gram of Cl- ion. Calculate the % chl…

1.When a sample of gas heated from 80.°c to 160.°c at a constant pressure, the v

1.When a sample of gas heated from 80.°c to 160.°c at a constant pressure, the volume of the gas doubles. true or false 2.STP is defined as a pressure of exactly one atmosphere an…

1.When an evacuated 100.0 - mL glass bulb is filled with a gas at 22.0 degrees C

1.When an evacuated 100.0 - mL glass bulb is filled with a gas at 22.0 degrees C and 747 mmHg. The bulb gains 0.1137 grams. Which gas is in the bulb, neon, argon, or nitrogen gas?…

1.When completing net ionic equation problems (when one aqueous solution reacts

1.When completing net ionic equation problems (when one aqueous solution reacts with another aqueous solution), explain why you do not further split up H2O (l) into H+ (aq) and OH…

1.When the following equation is balanced with lowest whole-number coefficients,

1.When the following equation is balanced with lowest whole-number coefficients, what is the coefficient for NO(g)?___NH3(g) + ___O2(g) ? ___NO(g) + ___H2O(g) 2. How many moles of…

1.When the reaction between bromate ions and bromide ions was studied, the follo

1.When the reaction between bromate ions and bromide ions was studied, the following tabulated data was obtained: BrO3 + 5Br + 6H ---> 3Br2 + 2H2O In order to determine the rea…

1.Which activity would a 70-kg person need to do to \"burn off\" a meal consisti

1.Which activity would a 70-kg person need to do to "burn off" a meal consisting of a hamburger (350 Calories), 3 oz of potato chips (1 oz = 108 Calories), and 2 beers (1 "regular…

1.Which anion is normally present in deionized water and can be precipitated by

1.Which anion is normally present in deionized water and can be precipitated by silver ions? (Note: Air is always dissolved in deionized water exposed to the atmosphere. Air is ma…

1.Which coenzyme is composed of a 2-mercaptoethylamine unit, the vitamin pantoth

1.Which coenzyme is composed of a 2-mercaptoethylamine unit, the vitamin pantothenate and an ADP moiety? options: a) biotin b)ubiquinone c) coenzyme A d)NADPH e) ATP 2. NAD+ and N…

1.Which compound will the most stable carbocation in an Sn1 reactions? 2.When a

1.Which compound will the most stable carbocation in an Sn1 reactions? 2.When a substrate undergoes an Sn1 reaction, the reaction proceed with? 3.Which alkyl halide reacts the fas…

1.Which of the following could form in an aldol condensation reaction? 2. what i

1.Which of the following could form in an aldol condensation reaction? 2. what is the product from the following aldol condensation? 3. The condensation of the equal amounts of be…

1.Which of the following gas samples would have the largest volume, if all sampl

1.Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure? A. 4 x 1023 molecules of H2 B. 0.106 moles CH4 C. 65.7…

1.Which of the following is a properties of a a sample of asubatance would not b

1.Which of the following is a properties of a a sample of asubatance would not be characteristics of the subsatance and hencewould not be useful in identifying the substance? A (c…

1.Which of the following is an oxidizer? a)AlCl 3 b)K 2 Cr 2 O 7 c)NaOH d)Cl 2 2

1.Which of the following is an oxidizer? a)AlCl3 b)K2Cr2O7 c)NaOH d)Cl2 2.In which case would exposure to a compound cause you more concern? (Choose one from each pair; ie. a or b…

1.Which of the following is not a chelating agent? EDTA Ethylene diamine Oxalate

1.Which of the following is not a chelating agent? EDTA Ethylene diamine Oxalate ion Cyanide ion Porphine I think it is EDTA but I am not sure. 2.How many valence electrons are th…

1.Which of the following is true in general of all cations? A.A cation has equal

1.Which of the following is true in general of all cations? A.A cation has equal numbers of protons and electrons. B.A cation has more protons than neutrons. C.A cation has fewer …

1.Which of the following lipid profiles would suggest a patient with heart disea

1.Which of the following lipid profiles would suggest a patient with heart disease: (Cholesterol, LDL, HDL) 280, 140, 30 250, 90, 35 200, 80, 50 280, 110, 65 2. The body mass inde…

1.Which of the following reactions will yield the cyclic ether cis-2,3dimethylox

1.Which of the following reactions will yield the cyclic ether cis-2,3dimethyloxacyclopropane? 2. Cyclic ethers are made using the same Sn reactions that are used to form non-cycl…

1.Which of the following represent three measurements that are the most precise?

1.Which of the following represent three measurements that are the most precise? A. 1.35, 1.20, and 1.28 B.1.02, 0.82, and 1.87 C.1.11, 1.93, and 1.90 D.1.20, 1.22, and 1.19 2. If…

1.Which of the following statements about the fundamental forces are correct? 2.

1.Which of the following statements about the fundamental forces are correct? 2. Which of the following are significantly affected by the force of gravity? 3. Which of the followi…

1.Which of the following statements are true about sulfuric acid\'s role in the

1.Which of the following statements are true about sulfuric acid's role in the esterification reaction.  Note that there may be more than one correct answer. 3.Why is a sodium bic…

1.Which of the following statements are true about sulfuric acid\'s role in the

1.Which of the following statements are true about sulfuric acid's role in the esterification reaction.  Note that there may be more than one correct answer. 3.Why is a sodium bic…

1.Which of the following statements are true about sulfuric acid\'s role in the

1.Which of the following statements are true about sulfuric acid's role in the esterification reaction.  Note that there may be more than one correct answer. 3.Why is a sodium bic…

1.Which of the following statements regarding the reversible binding of ligands

1.Which of the following statements regarding the reversible binding of ligands to proteins is not true? A) Proteins generally bind only specific ligands. B) Sometimes, ligand bin…

1.Which of the following would react faster than benzene in an electrophilic aro

1.Which of the following would react faster than benzene in an electrophilic aromatic substitution reaction? acetophenone benzoic acid anisole chlorobenzene 2.Which of the followi…

1.Which of these statements about cAMP is incorrect? a. cAMP is generated by cyc

1.Which of these statements about cAMP is incorrect? a. cAMP is generated by cyclization of ATP b. the mechanism of cAMP generation is catalyzed by adenylate cyclase c. cAMP is an…

1.Which one of the following is not a valid value for the magnetic quantum numbe

1.Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d subshell? Select one: A. 2 B. 0 C. 1 D. 3 E. 1 2.All of the orbitals in a …

1.Which one of the following species cannot act as a base? Select one: a. H 2 O

1.Which one of the following species cannot act as a base? Select one: a. H2O b. Cl– c. NH4+ d. OH– e. NH3 2. A gas with an empirical formula NO2 is weighed in a 1 L flask and fou…

1.Which one shows possible sets of quantum numbers for the last three electrons

1.Which one shows possible sets of quantum numbers for the last three electrons of a N atom at ground state? I. n l m s 2 0 -1 -1/2 2 0 0 -1/2 2 0 +1 -1/2 II. n l m s 2 1 -1 +1/2 …

1.Which plot in Q 1 correctly describes the magnitude of the current through the

1.Which plot in Q 1 correctly describes the magnitude of the current through the bulb as a function of time after the switch moves from B to A (when the next person uses the bathr…

1.Which solvent is suitable for an SN2 reaction mostly? A.Ethanol B.Chloroform C

1.Which solvent is suitable for an SN2 reaction mostly? A.Ethanol B.Chloroform C.Hexane D.DMF 2.Sulfide,HS-,is better nucleophile than hydroxide,HO-,because A.the negative charge …

1.Which type of radioactive emission is analogous to an electron being emitted?

1.Which type of radioactive emission is analogous to an electron being emitted? positron, neutrons, alpha particle, gamma rays, beta particle 2. Which isotope is naturally radioac…

1.Why are these pressures called partial pressures? (multiple choice) a. Each of

1.Why are these pressures called partial pressures? (multiple choice) a. Each of these pressures is less than 760 mmHg, e.g. it makes only a part of the atmospheric pressure and t…

1.Why are these pressures called partial pressures? (multiple choice) a. Each of

1.Why are these pressures called partial pressures? (multiple choice) a. Each of these pressures is less than 760 mmHg, e.g. it makes only a part of the atmospheric pressure and t…

1.Why can\'t you use acidic conditions (such as aqueous hydrochloric acid) for t

1.Why can't you use acidic conditions (such as aqueous hydrochloric acid) for the addition of a Grignard reagent to a ketone? Question options: Because the Grignard reagent will r…

1.Why do different metals give different colors for the flame test? 2.How do the

1.Why do different metals give different colors for the flame test? 2.How do the spectra lines for deuterium compare to those of hydrogen? Are they similar of different? Explain w…

1.Why is the boiling point of 3-methylheptane (bp 118 oC) less than that of n-oc

1.Why is the boiling point of 3-methylheptane (bp 118 oC) less than that of n-octane (bp 125 oC)? A. n-octane has a greater molar mass. As molar mass increases so does boiling poi…

1.Why would it be important to place the same amount of a solution in the polari

1.Why would it be important to place the same amount of a solution in the polarimeter tube when measuring optical rotation as the amount of solvent when measuring theblank? a. Onl…

1.Working together, the transistor and 50 ohm resistor directly control the volt

1.Working together, the transistor and 50 ohm resistor directly control the voltage at which point in the circuit: A. A B. B C. D D. E E .The power supply 2 The tiny electrical si…

1.Write a function in JavaScript that replaces the getElementByID with a $. 2.Wr

1.Write a function in JavaScript that replaces the getElementByID with a $. 2.Write a JavaScript that will write the variable MyName on the screen and if JavaScript is not support…

1.Write a grammar that generates strings that contain matched brackets and paren

1.Write a grammar that generates strings that contain matched brackets and parentheses. Examples of valid strings are: Examples of invalid strings are: 2. Given the following gram…

1.Write a method using Java syntax that takes a reference ‘r’ to the root of a b

1.Write a method using Java syntax that takes a reference ‘r’ to the root of a binary tree and returns the total number of leaves in the tree. You may use the Node class (structur…

1.Write a molecular equation for the precipitation reaction (if any) that occurs

1.Write a molecular equation for the precipitation reaction (if any) that occurs when the following solutions are mixed. If no reaction occurs, write noreaction . a. lithium sulfa…

1.Write a program that accepts as input the mass, in grams, and density, in gram

1.Write a program that accepts as input the mass, in grams, and density, in grams per cubic centimeters, and outputs the volume of the object using the formula: volume = mass / de…

1.Write an assembly language program that corresponds to the following C++ progr

1.Write an assembly language program that corresponds to the following C++ program: #include <iostream> using namespace std; const int amount = 20000; int num; int sum; int …

1.Write an introduction, procedure, and conclusion for this lab please. Also, th

1.Write an introduction, procedure, and conclusion for this lab please. Also, the fat I used was butter. 2. (Structure form): Butter+NaOH+EtOH= Soap upld Soap a) To prepare soap b…

1.Write reaction equations to explain how your acetic acid-acetate buffer reacts

1.Write reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base. 2.Buffer capacity has a rather loose definition, yet it is an…

1.Write the acid dissociation reaction for following solutions, and calculate th

1.Write the acid dissociation reaction for following solutions, and calculate the pH for each of them: a.0.001 M HCl b.0.005 M H2SO4 c.0.005 M KOH 2.A solution is prepared by diss…

1.Write the complete molecular equation for the reaction of Zn(NO3)2 and KOH. Us

1.Write the complete molecular equation for the reaction of Zn(NO3)2 and KOH. Use the "pi" button to enter the equation using the equation format and be sure to include the approp…