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Lithium iodide has a lattice energy of -730 kJ/mol and a heat ofhydration of -793 kJ/mol. Determine how much heat is evolvedor absorbed when 15.0 g of lithium iodide completely dissolves in water.
A police officer is driving due north at a constant speed of22 m/s relative to the ground when she notices a truck on the east-west highway ahead of her, driving we stat a high speed.
How do the moles of CO2 and carbonate mass reactant permit you to identify an unknown monovalent or divalent cation ofan unknown carbonate.
In the reaction of liquidmercury and oxygen to form mercury(II) oxide, what is the mass ofHgO produced from the reaction of 0.200 mol of liquid mercury and4.00g of oxygen gas?
How much larger would be the total inventory of water on Earth ifsome of it had not been consumed by photosynthesis to producemolecular oxygen?
The reaction below was allowed to proceed to equilibrium. Thecontents of a 2 liter reaction vessel were then subjected toanalysis and found to contain 1.0 mole of H2S, 0.20 moleH2, and 0.80 mole S2.
If each ofthese water molecules were enlarged to the the size of a billiardball (2.25 inches in diameter ) were stacked side-by-side on afootball field using only the in bounds area (120.00 yards by
Calculate the mass of silver chloride, AgCl, and dihydrogen monosulfide, H2S, formed when 85.6 g of silver sulfide, Ag2S, reacts with excess hydrochloric acid, HCl.
Protein A has a binding site for glucose with a Kd of 10-5M.Protein B has a binding site for glucose with a Kd of 10-7 M. Which protein has a higher affinity for glucose? Explain your reasoning.Als
What are the units of the rate constant k for this reaction? What would happen to the rate if [M] were doubled? What would happen to the rate if [O2] weredoubled? Would these 2 rates stay the same,d
The density of aluminum is 2.702g/cm3. What is the final liquid level of water if 32.04g of aluminum is dropped into a graduated cylinder containing 15.90mL of water?
Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The osmotic pressures required for this process can be as high as 20.1 atm.
A protein subunit from an enzyme is part of a research study andneeds to be characterized. A total of 0.160 g of this subunitwas dissolved in enough water to produce 2.00 ml ofsolution.
Consider the second-order reaction A--->B. The concentration of A decreases from 0.95 M to 0.44 M in 11 min. What will be the concentration of A after 21 minutes have elapsed?
Why does the second acetyl group enter the unoccupied ring toform diacetyl ferrocene? The question is asked regarding the reaction that occurs toform acetyl ferrocene (ferrocene molecules have two r
How many grams of ethylene glycol,C2H4(OH)2, are needed per kilogramof water to protect radiator fluid against freezing down to-10°C?
A galvanic cell consits of a cadmium cathode immersed in aCdSO4 solution and a zinc anode immerse in aZnSO4 solution. A salt bridge iconnects the two half-cells. Write a balanced equation.
The mass spectrum of a hypothetical element shows that 86.19% of the atoms have a mass of 27.977 u, 0.825% have a mass of 28.976 u, and the remaining have a mass of 29.974 u.
When 50.0 grams of silicon dioxide is heated with an excess of carbon, 32.2 grams carbonide along with carbon monoxide. what is the percent yield of silicon dioxide?
The equilibriumconcentrations for the reaction between carbon monoxide andmolecular chlorine to form carbonyl chloride at 74°C are [CO] =1.2 multiplied by 10-2M, [Cl2] = 0.054 M, and[COCl2] = 0.
Tetrafluorethylene (C2F4) effuses at rate of 4.6X10^-6 moles per hour. Unknown gas effuses at rate of 6.5X10^-6 moles per hour. under identical conditions, what's the molar mass of the unknown gas?
Use the van der Waalsequation to determine the molar volume of steam at 200 bar and 500°C. Compare this value with that for an ideal gas under thesame conditions.
One mole of a monatomic idealgas is expanded reversibly and adiabatically from an initial state(P1=1atm, V1=10 L) to a final state with volume 100L. What is the final pressure?
Calculate the standard reduction potential for the following couple. Use electrons, water, and protons to balance the reaction. Which molecule is the electron donor? What are the products?
Using the concepts of chemical kinetics, explain why food kept in the refrigerator or freezer does not spoil as quickly as food kept at room temperature. Address the effect of temperature on the mic