Chemistry concepts and calculations

2. What is the definition of normality (we\'re talking solution here)? of your a

2. What is the definition of normality (we're talking solution here)? of your answer, explain the difference between the molarity and normality of a solution of sulfuric acid H2So…

2. What is the difference between the interface and the implementation in a clas

2. What is the difference between the interface and the implementation in a class? 5. What is an invariant? Give examples. 8. Why should the public interface to a class be as smal…

2. What is the molarity of 0.500 L of NaOH solution if it contains 6.00 g of NaO

2. What is the molarity of 0.500 L of NaOH solution if it contains 6.00 g of NaOH? a. Determine the quantities of solute and solution. b. Write the concentration expression c. Sub…

2. What is the pH after addition of 0.015 mol HCL 3. What is the pH after additi

2. What is the pH after addition of 0.015 mol HCL 3. What is the pH after addition of 0.150 mol of NaOH ? Exercise 16.47 A 200.0 mL buffer solution is 0.230 Min acetic acid and 0.…

2. What is the percentage of copper (by weight) in copper(II) sulfate pentahydra

2.What is the percentage of copper (by weight) in copper(II) sulfate pentahydrate, CuSO4•5H2O? a. What is the percentage of Cu in the sample? b.What is the formula weight of the c…

2. What is the percentage of copper (by weight) in copper(II) sulfate pentahydra

2.What is the percentage of copper (by weight) in copper(II) sulfate pentahydrate, CuSO4•5H2O? a. What is the percentage of Cu in the sample? b.What is the formula weight of the c…

2. What is the pll of a0.8344 M KOH selution? Scrup Answer 3. a) What is the the

2. What is the pll of a0.8344 M KOH selution? Scrup Answer 3. a) What is the theeretical [J of a 0.00030 M HC1? a)Answer b) The above 0.00030 M HCI sohutics was prepared in the la…

2. What is the pressure in atm of 6.022 g CH, in a 30.0 L vessel at 129 C? A. 2.

2. What is the pressure in atm of 6.022 g CH, in a 30.0 L vessel at 129 C? A. 2.42 B. 0.414 C. 12.4 D. 22.4 E. 6.62 . Select the one equation shown below for which the enthalpy ch…

2. What is the role of the ceppornturnings in the fractionating column used in o

2. What is the role of the ceppornturnings in the fractionating column used in our fractional distillation? Class Beads 3. Compare the column packing used in the GC to thepninthe …

2. What is the safety hazard of working with a centrifuge? a.)The lid must be cl

2. What is the safety hazard of working with a centrifuge? a.)The lid must be closed while it is spinning at high speed. b.)The centrifuge can become unbalanced and explode. c.)Th…

2. What kind of intermolecular bond exists between molecules of CH4? 3. Write th

2. What kind of intermolecular bond exists between molecules of CH4? 3. Write the equation for the reaction showing the first electron affinity step in the formation of ferrous br…

2. What laboratory technique might be useful for determining the molecular weigh

2. What laboratory technique might be useful for determining the molecular weight of the tan solid you made and therefore the success of the experiment? Hint: you have never used …

2. What observation recorded in Table 30.3 indicated that butterfat in the milk

2. What observation recorded in Table 30.3 indicated that butterfat in the milk had been hydrolyzed? a. Milk color changed from pink to blue. b. Milk color changed from blue to pi…

2. What observation recorded in Table 30.3 indicated that butterfat in the milk

2. What observation recorded in Table 30.3 indicated that butterfat in the milk had been hydrolyzed? a.Milk color changed nom pink to blue. b Milk color changed from blue to pink.…

2. What physical/chemical properties allowed you to separate and confirm Lead (I

2. What physical/chemical properties allowed you to separate and confirm Lead (II), Mercury (I), and Silver)? Explain your answer in terms of Ksp SP. 3. What is the common ion eff…

2. What property of an atom defines the atom’s ability to attract electrons? 3.

2. What property of an atom defines the atom’s ability to attract electrons? 3. Is it possible for a molecule to have polar bonds, but still be nonpolar as an overall molecule? 4.…

2. What volume (in L) of ethylene glycol must be added to 4.0 gallons of water t

2. What volume (in L) of ethylene glycol must be added to 4.0 gallons of water to obtain a ATr of 20.0°C? 3. Determine the colligative ( effective) molality of a truly saturated s…

2. What volume (in mL) of 0.100 M sodium hydroxide (NaOH (aq)) will be needed to

2. What volume (in mL) of 0.100 M sodium hydroxide (NaOH (aq)) will be needed to completely neutralize 1 mL of 0.100 M hydrochloric acid (HCI (aq))? Briefly explain your answer. W…

2. When 1.00 L of 1.00 M Ba(NOg)z solution at 25.0 C is mixed with 1.00 L of 1.0

2. When 1.00 L of 1.00 M Ba(NOg)z solution at 25.0 C is mixed with 1.00 L of 1.00 M Na,SO4 solution at 25.0°C in a calorimeter, the white solid Ba mixture increases to 28.1°C. Ass…

2. When 1.000 mole of butane (C4H10) undergoes complete combustion, 2877 k of he

2. When 1.000 mole of butane (C4H10) undergoes complete combustion, 2877 k of heat are released. In a particular experiment, 12.6 L of butane, measured at 23.6°C and 738 mmHg, are…

2. When a neutralization reaction was carried out using 100.0 mL of o.7890M NH,

2. When a neutralization reaction was carried out using 100.0 mL of o.7890M NH, water and 100.0 mLof 0.79MM acetic acid, AT was found to be476"C. The specific heat of the reaction…

2. When a neutralization reaction was carried out using 100.0mL of 0.7890M NH3 w

2. When a neutralization reaction was carried out using 100.0mL of 0.7890M NH3 water and 100.0mL of 0.7940M acetic acid, T was found to be 4.76 degrees Celsius. The specific heat …

2. When a neutralization reaction was carried out using 100.0mL of 0.7890M NH3 w

2. When a neutralization reaction was carried out using 100.0mL of 0.7890M NH3 water and 100.0ml of 0.7940M acetic acid, T was found to be 4.76 degrees Celsius. The specific heat …

2. When a solid solution becomes \"ordered\", a new compound has formed. Conside

2. When a solid solution becomes "ordered", a new compound has formed. Consider a mixture of Au-Cu "ordered", a new compound has fomed. with a 1:3 atomic ratio. At high temperatur…

2. When a solution is allowed to crystallize slowly, impurities are excluded fro

2. When a solution is allowed to crystallize slowly, impurities are excluded from the growing crystal structure because: (Circle the right answer A, B, C or D)                    …

2. When analyzing the fuels data (87 octane, 91 octane, diesel, and ethanol), ex

2.  When analyzing the fuels data (87 octane, 91 octane, diesel, and ethanol), explain why the different fuels have different energy content, again based on molecular structure an…

2. When gasoline bu rns in a car engine, the heat released causes the products C

2. When gasoline bu rns in a car engine, the heat released causes the products CO2 and H the car's radiator. If the expanding gases do 451 J of work on the pistons and the System …

2. When iron (II) hydroxide is mixed with phosphoric acid, iron (II) phosphate p

2. When iron (II) hydroxide is mixed with phosphoric acid, iron (II) phosphate precipitate results as follows: Fe(OH): (aq) + HPO4 (aq) Fe( PO(s) + 110 (1) a. Balance the reaction…

2. When iron (II) hydroxide is mixed with phosphoric acid, iron (II) phosphate p

2. When iron (II) hydroxide is mixed with phosphoric acid, iron (II) phosphate precipitate results as follows: Fe(OH): (aq) + HPO4 (aq) Fe( PO(s) + 110 (1) a. Balance the reaction…

2. When pure sulfuric acid dissolves in water, a great deal of heat is given off

2. 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 10.0 o C. The…

2. When the 2015 FIFA Women’s World Cup reaches the seminals, four teams remain:

2. When the 2015 FIFA Women’s World Cup reaches the seminals, four teams remain: Germany, Japan, Canada, and the USA. Oddsmakers in Las Vegas are betting that the probability of t…

2. When the following solutions are mixed together, what precipitate (if any) wi

2. When the following solutions are mixed together, what precipitate (if any) will form? a. FeSO4(aq) + KCl(a) b. Al(NO)s(aq) Ba(OH)2(aq) c. CaCl2(a) +Na2SO44aq) d. K2S(aq) +Ni(NO…

2. When the molecular weight of carbon dioxide in lab, it is likely that some wa

2. When the molecular weight of carbon dioxide in lab, it is likely that some water vapor was present in the sample of gas trapped in the inverted beaker This is true whenever we …

2. When would the illness you have detected be considered notifiable? A. It is f

2. When would the illness you have detected be considered notifiable? A. It is foodborne. B. It affects more than 500 people within a seven-month period. C. It is listed with the …

2. Which alkyl bromide reacts fastest with sodium iodide in acetone: butyl bromi

2. Which alkyl bromide reacts fastest with sodium iodide in acetone: butyl bromide or neopentyl bromide? Both of these are primary alkyl bromides. Explain the difference in reacti…

2. Which is the most common carrier gas for gas chromatography? (a) helium (b) n

2. Which is the most common carrier gas for gas chromatography? (a) helium (b) nitrogen (c) hydrogen 3. In a gas chromatography experiment using a non-polar stationary phase (a) s…

2. Which of the following intermolecular forces exist in DNA? For each IMF prese

2. Which of the following intermolecular forces exist in DNA? For each IMF present in DNA explain which part (functional group, ion, or associated molecule - e.g, water) participa…

2. Which of the following is not a result from an experiment? A. Mass of sodium

2.        Which of the following is not a result from an experiment?   A.        Mass of sodium chloride was 4.5 g                B.         The temperature of the metal was 60 °C…

2. Which of the following organic solvents can be used in this experi- ment: eth

2. Which of the following organic solvents can be used in this experi- ment: ethanol, acetone, diethyl ether, methylene chloride, acetic acid, acetonitrile? Explain (Hint: Look up…

2. Which of the following organic solvents can be used in this experi- ment: eth

2. Which of the following organic solvents can be used in this experi- ment: ethanol, acetone, diethyl ether, methylene chloride, acetic acid, acetonitrile? Explain (Hint: Look up…

2. Which of the following statements is true (explain why)? a. A sample of oxyge

2. Which of the following statements is true (explain why)? a. A sample of oxygen gas at 273K will have a higher urms than a sample of oxygen at 1000K b. A sample of hydrogen gas …

2. Which of the following talerest The eftective auctear charge experienced by a

2. Which of the following talerest The eftective auctear charge experienced by an electron in as outer shell i le that the Within family (vertkal group in periodic tablehof radii …

2. Which of the following would not have a C-H stretch at about 3050 cm1 A) 1-pe

2. Which of the following would not have a C-H stretch at about 3050 cm1 A) 1-pentene B) 2-pentene 2-methyl-2-pentene 2,3-dimethyl-2-pentene E) 2,4-dimethyl-2-pentende 3 Explain t…

2. Which of the ollowing compounds will have odd m\'z value for the molecular io

2. Which of the ollowing compounds will have odd m'z value for the molecular ion? N. E. all of them A.I D. IV Which molecular formula is consistent with the following mass spectra…

2. Which process is endothermic? A) Water condenses on the outside of a cold sod

2. Which process is endothermic? A) Water condenses on the outside of a cold soda can. B) The melted wax hardens after a candle is extinguished. C) Water vapor forms ice crystals …

2. Why are electrothermal atomizers generally \"better\" for atomic absorption?

2. Why are electrothermal atomizers generally "better" for atomic absorption? 3. Why are fluorescence measurements made at 90 degrees from the incident beam in most cases? 4. What…

2. Why are pollutant gases that absorb in the \"window\" region of thermal IR of

2. Why are pollutant gases that absorb in the "window" region of thermal IR of more concern than gases that absorb wavelengths that overlap with carbon dioxide and water? a) Write…

2. Why do barium ions pass through the membrane? please explain na tube Test on

2. Why do barium ions pass through the membrane? please explain na tube Test on surrounding water Conclusions er is red Red Ink yes, red dvelink passed the insoluble compournd te …

2. Why is HSO4- stronger base than HS-? (a) In a series of oxybases with the sam

2. Why is HSO4- stronger base than HS-? (a) In a series of oxybases with the same central atom, the base with more O atoms is stronger. (b) In a series of oxybases with the same c…

2. Why should enough solid KHT be added to the KCI-NaCI solution to ensure that

2. Why should enough solid KHT be added to the KCI-NaCI solution to ensure that some solid remains undissolved after the 20-min stirring? 3. (a) Why should you make sure that the …