Chemistry concepts and calculations

9. Consider the coordination compound, K:[Cu(Br)]. A coordinate covalent bond ex

9. Consider the coordination compound, K:[Cu(Br)]. A coordinate covalent bond exists between A, K. and Br B.K. and Cu2. C.K. and [Cu(Br)4]2- D. Cu and Br E. Cu and Br 10. Choose t…

9. Consider the following equilibrium: N2o.(g) + Olg) 2N0(g) @Spts Nitrogen gas

9. Consider the following equilibrium: N2o.(g) + Olg) 2N0(g) @Spts Nitrogen gas and oxygen react when placed in a closed container. As the reaction proceeds toward equilibrium the…

9. Consider the following gases: (a) H20 at 375 K and 750 torr (b) He at 37.5 K

9. Consider the following gases: (a) H20 at 375 K and 750 torr (b) He at 37.5 K and 7500 torr (c) CH4 at 37.5 C and 7.5 atnm (d) Ne at 375 °C and 0.75 atm (e) SFo at -37.5 C and 0…

9. Consider the following gases: (a) H20 at 375 K and 750 torr (b) He at 37.5 K

9. Consider the following gases: (a) H20 at 375 K and 750 torr (b) He at 37.5 K and 7500 torr (c) CH4 at 37.5 C and 7.5 atnm (d) Ne at 375 °C and 0.75 atm (e) SFo at -37.5 C and 0…

9. Construct the Lewis structure model for the covalent compound silicor dioxide

9. Construct the Lewis structure model for the covalent compound silicor dioxide (SiO2) using the following steps. (1) The total number of valence electrons in SiO2 is (2) Arrangi…

9. Construct the Lewis structure model for the covalent compound silicor dioxide

9. Construct the Lewis structure model for the covalent compound silicor dioxide (SiO2) using the following steps. (1) The total number of valence electrons in SiO2 is (2) Arrangi…

9. Data for the following reaction are given in the table below. CO(g) + NO2(g)

9. Data for the following reaction are given in the table below. CO(g) + NO2(g) CO2(g) + NO(g) Experiment [CO] (mol/L) NO2J(mol/L) Initial rate (Mhr) 5.0 x 10 5.0 x 10 1.0 x 10 1.…

9. Delta G gives a criteria for spontaneity at a given temperature and pressure.

9. Delta G gives a criteria for spontaneity at a given temperature and pressure. If delta G is negative, the process is spontaneous. If delta G is positive, the process is non spo…

9. Describe how to prepare a 1.00 L buffer solution from stock solutions of 2.00

9. Describe how to prepare a 1.00 L buffer solution from stock solutions of 2.00 M NH3 and 1.50 M NH CI to have a pH of 9.50. Calculate the volumes, in mL, of NH, and NH CI that y…

9. Determine the molar concentration of ethanol (C2Heo) in a wine that is 14% et

9. Determine the molar concentration of ethanol (C2Heo) in a wine that is 14% ethanol by mass. The density of this wine is 0.93 g/cm3. a. 13.0 M d, 0.14 M b. 0.063 M e, 3.0 M c. 2…

9. Determine which of the following statements is (are) incorrect with respect t

9. Determine which of the following statements is (are) incorrect with respect to the following chemical equationng statements is incorect a) Two atoms of hydrogen b) The chemical…

9. Electrons determine the chemical reactivity of an atom A) True B) False C) no

9. Electrons determine the chemical reactivity of an atom A) True B) False C) none of the above 10. K and NH are examples of A) Anion B) Cation C) A and B d) none of the above 11.…

9. Electrons determine the chemical reactivity of an atom A) True B) False C) no

9. Electrons determine the chemical reactivity of an atom A) True B) False C) none of the above 10. K and NH are examples of A) Anion B) Cation C) A and B d) none of the above 11.…

9. Eureka! I discovered a large rock in my backyard that had an interesting comp

9. Eureka! I discovered a large rock in my backyard that had an interesting composition and took it into the lab to see what I had found. After isolating the different components …

9. Explain why the atomic radii decrease from left to right through a period of

9. Explain why the atomic radii decrease from left to right through a period of elements (in the periodic table), but increases from top to bottom through a group of elements? 9. …

9. Find the mass in grams. a. 4.30*10^16 atoms He, 4.00 g/mol b. 5.710*10^23 mol

9. Find the mass in grams. a. 4.30*10^16 atoms He, 4.00 g/mol b. 5.710*10^23 molecules CH4, 16.05 g/mol c. 3.012*10^24 ions Ca^2+, 40.08 g/mol 10. Find the number of molecules or …

9. For a chemical system that is in dynamic equilibrium, which of the following

9. For a chemical system that is in dynamic equilibrium, which of the following statements is FALSE? A) Both reactants and products are present in the reaction mixture B) The C) T…

9. For the above reaction, determine the value of the rate constant and be sure

9. For the above reaction, determine the value of the rate constant and be sure to include units. Use the following data and first-order reaction information for questions 10-13. …

9. For the following equilibrium reaction, Et CO2(g) + 2 H2O(l)=CH4(g) + 2 Odg)

9. For the following equilibrium reaction, Et CO2(g) + 2 H2O(l)=CH4(g) + 2 Odg) :890 kJ Indicate which direction the reaction will shift when the following changes occur by circli…

9. Give the number of protons, neutrons, and electrons in an atom of the \"Sr is

9. Give the number of protons, neutrons, and electrons in an atom of the "Sr isotope. a, 52 p, 38 n. 52 e d. 38 p, 52 n, 38 e b, 38 p, 90 n, 38 e c, 38 p, 38 n, 38 e e, 90 p, 38 n…

9. Give the number of protons, neutrons, and electrons in an atom of the \"Sr is

9. Give the number of protons, neutrons, and electrons in an atom of the "Sr isotope. a, 52 p, 38 n. 52 e d. 38 p, 52 n, 38 e b, 38 p, 90 n, 38 e c, 38 p, 38 n, 38 e e, 90 p, 38 n…

9. Given the following documents determine the weights for Nave Bayesian categor

9. Given the following documents determine the weights for Nave Bayesian category for document to be about Trees. Given the new document listed determine if it should be given the…

9. Given the following thermochemical equations, determine DH (in kJ) for the re

9. Given the following thermochemical equations, determine DH (in kJ) for the reaction between magnesium and water vapor to form 1.3 moles of MgO. Mg(s) + ½ O2(g) MgO(s) H2(g) + ½…

9. G°-95 kJ for a reaction at 25°C. Calculate the equilibrium constant, K, at 25

9. G°-95 kJ for a reaction at 25°C. Calculate the equilibrium constant, K, at 25°C. e) 4.5x1018 a) 1.04 b) 2.2x1038 c) 4.9×101 d) 2.2x10 10. The standard reduction potentials are …

9. How many grams of CaCO 3 are present in a sample if there are 4.52 x 10 24 at

9. How many grams of CaCO3 are present in a sample if there are 4.52 x 1024 atoms of carbon in that sample? Determine the answers to the following on a separate sheet of paper: 9.…

9. How many grams of magnesium hydroxide are needed to make 200mL of a 2.5M magn

9. How many grams of magnesium hydroxide are needed to make 200mL of a 2.5M magnesium hydroxide solution? 10. What is the pH of the room temperature magnesium hydroxide solution p…

9. How much heat is required to raise the temperature of 200.0 g of Fe0, from 5.

9. How much heat is required to raise the temperature of 200.0 g of Fe0, from 5.0 C to 25.0 °C? The specific heat of FeOs is 0.634 Jg°C a. 1200J b. 2500 J c. 90 d. 600J e. 1.3 J 1…

9. How would the following changes affect the appearance of the hydrogen spectru

9. How would the following changes affect the appearance of the hydrogen spectrum: a. The amount of hydrogen gas is reduced by a factor of 2 b. The hydrogen gas contained some imp…

9. Human saliva has a pH value of approximately 6.8, and can be considered a: a.

9. Human saliva has a pH value of approximately 6.8, and can be considered a: a. strong base K weak acid c. strong acid d. weak base 10. The following reaction will occur: a. non …

9. Hume-Rothery rules ( Hume-Rothery\'s rules are necessary but are not sufficie

9. Hume-Rothery rules ( Hume-Rothery's rules are necessary but are not sufficient for materials to show unlimited solid solubility) -1.5 Hume-Rothery rules (listed in the order of…

9. Hume-Rothery rules ( Hume-Rothery\'s rules are necessary but are not sufficie

9. Hume-Rothery rules ( Hume-Rothery's rules are necessary but are not sufficient for materials to show unlimited solid solubility) -1.5 Hume-Rothery rules (listed in the order of…

9. Hydrogen chloride gas is highly soluble in water. When dissolved in water the

9. Hydrogen chloride gas is highly soluble in water. When dissolved in water the solution is called hydrochloric acid. When 10.o g of hydrogen chloride is dissolved in 1oo.o g of …

9. Identify the functional group present in each of the following structures as

9. Identify the functional group present in each of the following structures as a hydrate, above. Write your answer on the space below each structure. acetal, hemiacetal, or none …

9. If a bail is dropped in a vacuum chamber, it will acquire a A. variable speed

9. If a bail is dropped in a vacuum chamber, it will acquire a A. variable speed B. constant speed C. variable acceleration D. constant acceleration 10. Two objects are suspended …

9. If a gas is stored at 2 atm pressure in 5.0Lcontainer, what will be the press

9. If a gas is stored at 2 atm pressure in 5.0Lcontainer, what will be the pressure of gas if it is transferred to a 7.0L container? hat will be the pressure of a gas in a 250 ml …

9. If an aqueous solution of is added to a misture of F and So, ion will remain

9. If an aqueous solution of is added to a misture of F and So, ion will remain in solution. , the fluoride ion will precipitate, but the sulfate 10. Which of the following coempo…

9. If enough of a monoprotic acid is dissolved in water to produce a 0.018 M sou

9. If enough of a monoprotic acid is dissolved in water to produce a 0.018 M soultion with a pH of 6.58, what is the equilibrium constant, Ka, for the acid? 10. For the following …

9. If the packing coefficient for a pure liquid s 0.81 then 81% of the bulk liqu

9. If the packing coefficient for a pure liquid s 0.81 then 81% of the bulk liquid's volume would actually be occupied by molecules and the rest of the volume would be empty space…

9. If we start with 1.000 g Sr-90,0.953g remains after 2 years. A) Find the half

9. If we start with 1.000 g Sr-90,0.953g remains after 2 years. A) Find the half-life for Sr-90, and b) how much Sr-90 remains after 5 years?. 10. What is the mass defect, the nuc…

9. In the process of dialysis, a special semipermeable membrane allows both smal

9. In the process of dialysis, a special semipermeable membrane allows both small molecules and water to pass through, but not large protein molecules. These membranes are used to…

9. It is found that 250. mL of gas at STP has a mass of 1.00 g. What is the mola

9. It is found that 250. mL of gas at STP has a mass of 1.00 g. What is the molar mass? [A] 22.4 g/mol [B] 28.0 g/mol [C] 14.0 g/mol [D] 89.6 g/mol [E] none of these 10. Calculate…

9. Label 5 small test tubes. Add one drop of 1-butanol to the first tub, one dro

9. Label 5 small test tubes. Add one drop of 1-butanol to the first tub, one drop of 2-butanol to the second tube. Continue appropriately for the other reagents indicated. 10. Add…

9. Liquid X floats on top of liquid Y, as shown in the graduated cylinder to the

9. Liquid X floats on top of liquid Y, as shown in the graduated cylinder to the right Suppose liquid Z has a density of 3.8 g/mL, measured to 2 significant figures. Assuming Liqu…

9. List all the quantum numbers for each of the 10 electrons in neon. me 2. 3. 4

9. List all the quantum numbers for each of the 10 electrons in neon. me 2. 3. 4. 6. 8. 10, According to the Aufbau principle, what are the possible quantum numbers for the last e…

9. Many analyses must be done on mixtures and it is common that the measurement

9. Many analyses must be done on mixtures and it is common that the measurement of a specific ion of interest is interfered with by the presence of other ions. For example, the an…

9. Many analyses must be done on mixtures and it is common that the measurement

9. Many analyses must be done on mixtures and it is common that the measurement of a specific ion of interest is interfered with by the presence of other ions. For example, the an…

9. Measure the length of the incline, L, whi and the resting point on the table.

9. Measure the length of the incline, L, whi and the resting point on the table. ch is the distance between the resting point of the ramp in the book nerleur the heijght. h, the h…

9. Modern pennies are composed of zinc coated with copper. A student determines

9. Modern pennies are composed of zinc coated with copper. A student determines the mass of a penny to be 2.485 g and then makes several scratches in the copper coating (to expose…

9. On the design of Plate Heat exchangers the turbulence helps prevent particles

9. On the design of Plate Heat exchangers the turbulence helps prevent particles from settling or plating out. Particle build up creates "Resistance/Fouling" inside the equipment.…

9. Oxygen is an efficient quencher of fluorescence because it is a triplet in it

9. Oxygen is an efficient quencher of fluorescence because it is a triplet in its electronic ground state. The unpaired spins of O can induce the excited state of the fluorescent …