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Two cooling fluids are available - cooling tower water at 20oC and a refrigerant at -35oC. For each fluid determine the % acetone recovery, assuming that the coolant temperature equals the condenser
Two iron bolts of equal mass - one at 100 degrees Celcius, the other at 55 degrees Celcius - are placed in an insulated container. Assuming the heat capacity of the container is negligible, what is
Calculate the change in the normal freezing point at 175 and 625 bar assuming that the density of the liquid and solid phases remains constant at 997 and 916 kg/m^3, respectively. Explain why your a
An unknown compound has a formula XF3. If the mass spectra of the molecular ion has only 2 peaks, one of which has a mass of 68 amu and a relative intensity of 100% and a second that has a mass of 6
Without calculation, but referring to the appropriate dissociation constants, carefully sketch a single variable species distribution diagram (α vs pH) for this acid in water.
Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 10^15s^-1 before it can emit an electron from its surface via the photoelectric effect.
The mineral is pyroxene.1. recalculate the analysis into chemical formula.The formula should show the atoms of each element in a formula that has 6 oxygen atoms.A) start with the column showing the
Describe the metallic bonding present in aluminium and explain why aluminium has a higher melting point Why does aluminum have a higher melting point than sodium?
What is the balanced chemical reactions when carbon dioxide reacts with water? How can carbon dioxide change the pH of water and what happens to the pH when this happens, does it go up or down?
If a homeowner maintains their house at 68F, what outside temperature would be competitive with an oil furnace that recovered 80 percent of the heating value of the fuel?
How does the excess CO2 gas in the atmosphere cause the greenhouse effect? What are the potential long-term consequences of greenhouse effect?
A 3 ft^3 adiabatic rigid container is divided into two equal volumes by a thin membrane. Initially, one of these chambers is filled with air at 100 degrees Fahrenheit, and 100 psia, while the other
A solution containing 15.13 g of glucose in 100.0g of water was found to freeze at -1.29C with a 1.53 C/m. What is the molar mass of glucose?
A 1.4- container of liquid nitrogen is kept in a closet measuring 1.2 by 1.2 by 1.9 . Assuming that the container is completely full, that the temperature is 29.2, and that the atmospheric pressure
The action of an alkaline I2 solution on the rodenticide warfarin, C19H16O4 (308.34 g/mol), results in the formation of 1 mol of iodoform, CHI3 (393.73 g/mol) for each mole of the parent compound re
A 0.6407 g sample containing chloride and iodide ions gave a silver halide precipitate weighing 0.4430 g. This precipitate was then strongly heated i a stream of Cl2 gas to covert the AgI to AgCl. O
A vessel contains 0.90 g liq H2O in equilibrium with water vapor at 30C. At this temperature, the vapor pressure of H2O is 31.82 torr. What volume increase is necessary for all the water to evapora
The enthalpy change when a strong acid is neutralized by strong base is -56.1 kJ/mol. If 135 mL of 0.450 M HI at 23.15°C is mixed with 145 mL of 0.500 M NaOH, also at 23.15°C, what will the
A pure gold ring and pure silver ring have a total mass of 16.2 g. The two rings are heated to 64.8 C and dropped into 13.9 mL of water at 21.5 C. When equilibrium is reached, the temperature of the
Determine the pH of an equilibrium aqueous mixture of 1.0 M glycine (Gly) and 0.5 M HCl assuming that pKdn(aN) = 9.8 for the alpha-amino group, and pKdn(aC) = 2.4 for the alpha-carboxyl group of th
Lead (Pb) has an electron configuration of [Xe]6s^2 4f^14 5d^10 6p^2. Use this information to explain why it commonly forms 2+ and 4+ ions. What are the electron configurations of each of these ions
Three gases (8.00 of methane, , 18.0 of ethane, , and an unknown amount of propane, ) were added to the same 10.0- container. At 23.0 , the total pressure in the container is 3.80 .
Assuming that air contains 78% N2, 21% O2, and 1% Ar, all by volume, how many molecules of each type of gas are present in 1L of air at STP?
What is the ionization energy of rubidium atoms (in kilojoules per mole) if light with Lambda = 58.4 nm produces electrons with a velocity of 2.450 x 10^6 m/s? (The mass of an electron is 9.109 x 10
A 10.00 mL portion of HCL sol was diluted to 50.00 mL. If 5.00 mL of this solution required 41.00 mL of 0.2550 M sodium hydroxide for complete neutralization, what was the concentration of the orig