Chemistry concepts and calculations
117302 questions • Page 213 / 2347
16. Mass of chemical constituents. For each of the following species in the pres
16. Mass of chemical constituents. For each of the following species in the present day Earth atmosphere, calculate i) the mass fraction, and the total mass in the Earth's atmosph…
16. Pick out the wrong statement. A. O2, NO and NO2 exhibit paramagnetic propert
16. Pick out the wrong statement. A. O2, NO and NO2 exhibit paramagnetic properties as a result of unpaired electrons. B. CO2 is the strongest paramagnetic gas. C. Paramagnetic su…
16. Refer to the plot below to answer this question. A solution is prepared by d
16. Refer to the plot below to answer this question. A solution is prepared by dissolving 40 g of KClO3 in 100 mL H2O at 90 degree C. The solution is that slowly cooled to 50 degr…
16. Stereoisomers of 1,3-dichlorocyclopentane Cyclopentane ring is essentially p
16. Stereoisomers of 1,3-dichlorocyclopentane Cyclopentane ring is essentially planar. 1,3-dichlorocyclopentane has two stereocentres. Cis-1,3-dichlorocyclopentane is a meso compo…
16. The evaporation of liquid water at room temperature (25 °C) and \"ordinary\"
16. The evaporation of liquid water at room temperature (25 °C) and "ordinary" conditions is spontaneous despite the fact that the standard free energy change (AG°) for HyOH0(8) i…
16. The pH of a solution of hydrochloric acid is 2.80. What is the molarity of t
16. The pH of a solution of hydrochloric acid is 2.80. What is the molarity of the acid? A. 6.3 X10-3 M 4.2 X10-3 M 1.6X10-3 M 6.3 X10-2 M 4.2 X 10-2 M 17.The pH of a solution is …
16. The reaction 250 he reaction 250 le 20 le A) no change will occur in K. B) m
16. The reaction 250 he reaction 250 le 20 le A) no change will occur in K. B) more SO, will be produced C) K, will increase el is endothermie. If the temperature is increased. D)…
16. The reaction Chicly(g) t Clxg) Cocidg) HCig) has io been proposed cl 201 fas
16. The reaction Chicly(g) t Clxg) Cocidg) HCig) has io been proposed cl 201 fast equilibri CHCI, C1 HCI OCI slow step What is the rale law predicted by this mechanism? 17. For wh…
16. Valence shell electron pair repulsion (VSEPR) theory is based on which of th
16. Valence shell electron pair repulsion (VSEPR) theory is based on which of the following concepts? A. The concept that electrons in a molecule will repel each other due …
16. What is the empirical formula for the ionic crystal structure pict the right
16. What is the empirical formula for the ionic crystal structure pict the right? For clarity each atomis labeled as b-body, face, e-edge and c corner. A) A2B B) AB2 C) AB2 E) AB …
16. What is the energy of a photon with a wavelength Q) of 486 nm? (A) 3.22x10-\
16. What is the energy of a photon with a wavelength Q) of 486 nm? (A) 3.22x10-" (C) 1.07×10-19J Which is an allowed set of quantum numbers for a 4d (B) 4.09× 10-28 J (D) 4,0% 10-…
16. What is the ultimate product of this sequence of reactions? CH.CH OH CH NH,
16. What is the ultimate product of this sequence of reactions? CH.CH OH CH NH, a (1 04) U room E) V A) 1 D) IV B) H B) H c) II ) III A) I 17. What would be the final organic prod…
16. What was Pangea? A. A genus of reptiles that ruled the world 150 million yea
16. What was Pangea? A. A genus of reptiles that ruled the world 150 million years ago B. A mountain chain that circled the globe 300 million years ago C. A super continent propos…
16. When 1 mole of the fossil fuel methane gas (CHa) is burned at constant press
16. When 1 mole of the fossil fuel methane gas (CHa) is burned at constant pressure, 890 kJ of energy is released as heat. a. (3 pts) Write the balanced chemical equation for the …
16. When using overloaded functions in appication code, the compiler will call w
16. When using overloaded functions in appication code, the compiler will call which one 17. Constructors, which are automatically called when? 18. the overloaded function execute…
16. Which is the structure fon trans-1-sopropy-3-methyicydohexand b) II c) II d)
16. Which is the structure fon trans-1-sopropy-3-methyicydohexand b) II c) II d) IV 17. What is the IUPAC name for the following cycloalkane? a) 2,4-dimethyl-1-ethylcyclopentane b…
16. Which layers are the youngest ; near ocean basin ocean ridges edges of ocean
16. Which layers are the youngest ; near ocean basin ocean ridges edges of ocean basins all of the above 17. Which represents the correct order of Earth’s layers from exterior to …
16. Which of following metals could provide cathodic protection o A. Al & Cu 17.
16. Which of following metals could provide cathodic protection o A. Al & Cu 17. M A. Sacrificial anode 18. When a buried pipeline is protected from corrosion by connecting tw…
16. Which of following metals could provide cathodic protection o A. Al & Cu 17.
16. Which of following metals could provide cathodic protection o A. Al & Cu 17. M A. Sacrificial anode 18. When a buried pipeline is protected from corrosion by connecting tw…
16. Which of the following is not a proof of sphericity of the earth a. Circumna
16. Which of the following is not a proof of sphericity of the earth a. Circumnavigation of the earth b. Seasons c. Space photographs d. Ship's visibility 23. When do regions nort…
16. Why is the third ionization energy of magnesium much greater than that of al
16. Why is the third ionization energy of magnesium much greater than that of aluminum? (8 pt) 17. For each of the following sets of atoms and ions, arrange the mem…
16. You synthesized 3.204 g of Ni(NH3)nCl2. The mass percent of NH3 and Ni2+ in
16. You synthesized 3.204 g of Ni(NH3)nCl2. The mass percent of NH3 and Ni2+ in the synthesized Ni(NH3)nCl2 were 44.1% and 25.3%, respectively. Molar mass of Ni2+ , NH3 and Cl2 ar…
16. a. 125 mL b. 250 mL c. 500mL d. 2000mL e. 1000mL Can someone please help me
16. a. 125 mL b. 250 mL c. 500mL d. 2000mL e. 1000mL Can someone please help me with my chemistry test review? I need the answers. What are the stoichiometric coefficients for oxy…
16. a.) In the laboratory, a general chemistry student measured the pH of a 0.37
16. a.)In the laboratory, a general chemistry student measured the pH of a 0.376 M aqueous solution of caffeine, C8H10N4O2to be 12.108. Use the information she obtained to determi…
16. uate the specific rate constant at the temperature at which the data were co
16. uate the specific rate constant at the temperature at which the data were collected. The rate-law expression is rate KNOF[H H2(g) + NO(g) N20(g) + H2O(g) Experiement nt Initia…
16.) Suppose that following the procedure of Experiment T (Enthalpy and Entropy
16.) Suppose that following the procedure of Experiment T (Enthalpy and Entropy Changes) you had reacted a 0.950 g sample of MgO with 60.0 mL of 1.2 M HCl according to the reactio…
16.1 Ch. 7.8-9 Work, Energy, and Power in Humans; World Energy Use Please show w
16.1 Ch. 7.8-9 Work, Energy, and Power in Humans; World Energy Use Please show work! Calculate the minimum safe distance you can be from a speaker that puts out 2.00 W of sound, u…
16.1 mL of 0.0478 M sodium thiosulfate is used to reach an end point with 10 mL
16.1 mL of 0.0478 M sodium thiosulfate is used to reach an end point with 10 mL of Calcium Iodate. Using math we find that 7.696x10-4 mols of thiosulfate was used in the rxn. Sinc…
16.177 g of a non-volatile solute is dissolved in 290.0 g of water. The solute d
16.177 g of a non-volatile solute is dissolved in 290.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays id…
16.177 g of a non-volatile solute is dissolved in 290.0 g of water. The solute d
16.177 g of a non-volatile solute is dissolved in 290.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays id…
16.2 Captain Kirk, of the Starship Enterprise, has been told by his superiors th
16.2 Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals…
16.34 write chemical equations for the acid ionizations of each of the following
16.34 write chemical equations for the acid ionizations of each of the following weak acids (express these terms of Hsot) a HCO2H (formic acid b. HF bydrofluoric acid c. HN3 azoic…
16.50 For each of the following solutions, calculate the initial pH and the fina
16.50 For each of the following solutions, calculate the initial pH and the final pH after adding 0.0150 mol of NaOH For 240.0 mL of a buffer solution that is 0.205 M in HCHO2 and…
16.636 g of a non-volatile solute is dissolved in 410.0 g of water. The solute d
16.636 g of a non-volatile solute is dissolved in 410.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays id…
16.636 g of a non-volatile solute is dissolved in 410.0 g of water. The solute d
16.636 g of a non-volatile solute is dissolved in 410.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays id…
16.7 g of silver nitrate is dissolved in 98.32 g of water for a total solution m
16.7 g of silver nitrate is dissolved in 98.32 g of water for a total solution mass of 101.16 g that is at 4.0 degree C. Molarity of silver nitrate? Molarity of silver? Molarity o…
16.a CHEM 210 (Donohoue Test 2:10/30/2017 Due: Thursday 11/16/2017 (Last Day of
16.a CHEM 210 (Donohoue Test 2:10/30/2017 Due: Thursday 11/16/2017 (Last Day of class) Part 4: Polyprotic acids (Answer gll questions in this section) 16. As you know carbonic aci…
16.a.)A buffer solution contains 0.339 M ammonium bromide and 0.316 M ammonia. I
16.a.)A buffer solution contains 0.339 M ammonium bromide and 0.316 M ammonia. If 0.0573 moles of potassium hydroxide are added to 250 mL of this buffer, what is the pH of the res…
16.b CHEM 210 (Donohoue) Due: Thursday 11/16/2017 (Last Day of class) Part 4: Po
16.b CHEM 210 (Donohoue) Due: Thursday 11/16/2017 (Last Day of class) Part 4: Polyprotic acids (Answer all questions in this section) 16. As you know carbonic acid, H COs, is of c…
16.c CHEM 210 (Donohoue) Test 2:10/30/2017 Due: Thursday 11/16/2017 (Last Day of
16.c CHEM 210 (Donohoue) Test 2:10/30/2017 Due: Thursday 11/16/2017 (Last Day of class) Part 4: Polyprotic acids (Answer all questions in this section 16. As you know carbonie aci…
16.e Due: Thursday 11/16/2017 (Last Day of class) Part 4: Polyprotic acids (Answ
16.e Due: Thursday 11/16/2017 (Last Day of class) Part 4: Polyprotic acids (Answer all questions in this section) 16. As you know carbonic acid, H COs, is of co ncern in the lab b…
16/3 When a solution contains a weak acid and its conjugate base or a weak base
16/3 When a solution contains a weak acid and its conjugate base or a weak base and its conjugate acid, it will be a buffer solution. For a solution of a weak acid (HA) and its co…
162 Determination of the Equilibrium Constant for a Chemical Reaction 2. Assume
162 Determination of the Equilibrium Constant for a Chemical Reaction 2. Assume that the reaction studied in Problem lis Fe aq 2 SCN (aq Fe(SCN) (aq). Find K for this reaction, gi…
162 Experiment 20 Rates Chemical Rouctora, L The lodnalon ce Acetone 3. A second
162 Experiment 20 Rates Chemical Rouctora, L The lodnalon ce Acetone 3. A second reaction mixture was made up in the following way: 5 mL 4.0 M acetone+20 mL. 1.0M HCI+ 10 mL. 0.00…
162 Experiment 20 Rates Chemical Rouctora, L The lodnalon ce Acetone 3. A second
162 Experiment 20 Rates Chemical Rouctora, L The lodnalon ce Acetone 3. A second reaction mixture was made up in the following way: 5 mL 4.0 M acetone+20 mL. 1.0M HCI+ 10 mL. 0.00…
162 Part B: Calcium lodate with 00500 M Calcium lons Trial #1 Trial #2 Volume of
162 Part B: Calcium lodate with 00500 M Calcium lons Trial #1 Trial #2 Volume of Calcium lodate with Calcium Nitrate Solution Aliquot Added (L) | 5 m L-???st Initial Volume Thiosu…
165 View Zoom InsertTable Chart TextShape Media Comment Collaborate Format Docum
165 View Zoom InsertTable Chart TextShape Media Comment Collaborate Format Document Text Q3) An object is moved by two people. one pushed with force of -2.62 Ni - 5.31 Nj. The sec…
167 PRELAB This prelab must be completed and handed in to your TA before you sta
167 PRELAB This prelab must be completed and handed in to your TA before you start the prelab lecture. Also complete a copy of this prelab so you will have a copy of your predicti…
1673 What is the pH of a solution that is 0.10 M CH,NH2 (methylamine) and 0.15 M
1673 What is the pH of a solution that is 0.10 M CH,NH2 (methylamine) and 0.15 M CH;NH,CI (methylammonium chloride)? 16.74 What is the pH of a solution that is 0.15 MC2HNH2 (ethyl…
168 PROP0481: Detetmining the Molar Mass of a Volatile Liquid by the Dumas Metho
168 PROP0481: Detetmining the Molar Mass of a Volatile Liquid by the Dumas Method 3. A student following the procedure of this experiment obtained the following data for an unknow…
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