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Oxygen difluoride, OF2, is a colorless, poisonous gas that reacts rapidly with water vapor to produce O2, HF, and heat. OF2(g) + H2O(g) --> 2HF(g) + O2(g) + 324.4 kJ
What will the temperature be when the ice cube has just melted. Use 4.184 J/K*g for the specific heat capacity of ice and water. If the water is then heated to 80 degrees C by burning methane (delta
Predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
The specific heat of water is 4.18 . Calculate the molar heat capacity of water. What mass of natural gas must you burn to emit 258 of heat
80.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar
How many grams of ice at -9.4 can be completely converted to liquid at 6.2 if the available heat for this process is 5.96×103? For ice, use a specific heat of 2.01 and = 6.01.
Calculate the enthalpy change, , for the process in which 41.5 of water is converted from liquid at 2.1 to vapor at 25.0.
What is the longest wavelength of radiation with enough energy to break carbon-carbon bonds
How many photons are required to heat 235 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/mol , and specific heat capacity, 4.184 J?g*K, as water over this te
A microwave oven operates at 2.40 GHz. What is the wavelength of the radiation produced by this appliance? in nano meters
Hospital X-ray generators emit X rays with wavelength of about 15.0 nanometers (nm), where 1nm=10^9-m. What is the energy of a photon of the X rays
How many moles of oxygen molecules would be needed to react with 111.2 grams of iron? How many grams of rust would result from this reaction
predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
Adrenaline is a hormone released in response to physical and mental stress. A solution is prepared with 1.5g of adrenaline in 175g. of CCl4 (Tf= -22.3 degrees celcius and Kf = 29.8 C/m.) The freezin
A solution is prepared by dissolving 138.50 g of sucrose, a nonelectrolyte, in 250.0 g of dionized water. The freezing point of the solution was determined experimentally to be -3.0 C.
Draw a potential energy diagram for the rotation about the 3,4 carbon-carbon bond plotting potential energy versus torsion angle for 2-methylhexane
How to calculate the theoretical yield for diels alder-synthesis of 1,2,3,4-tetraphenylnaphthalene which is generate from benzyne (anthranillic acid+ isomanyl nitrite) and the presence of 2,3,4,5-t
Express the concentration of a 0.0860 M aqueous solution of fluoride, F-, in mass percentage and in parts per million (ppm). Assume the density of the solution is 1.00 g/mL.
Every antacid contains one or more ingredients capable of reacting with excess stomach acid (HCl). The essential neutralization products are CO2 and/or H2O. Write net ionic equations to represent th
How many neighboring hydrogen atoms must the CH2 group (at 2.65 ppm H NMR ) of propyl amine see in order to have its signal split into a triplet
what fragmentation must occur in this compound to produce a base peak at m/z 30 in the mass spectrum
What is the mole fraction of solute and the MOLAL (MOLALITY NOT MOLARITY!!!!!) concentration for an aqueous solution that is 14.0% NaOH by mass
If propyl amine was dissolved in ether along with biphenyl, what is the best way to separate the compounds
In the hydrogen atom, for which transition is the emission line observed at shorter wavelength, n=4 to n=2 or n=5 to n=1? Show the equation needed to figure this out. Consider the relative size of d
suppose that hydrogen atoms are prepared in the n=2 energy level. calculate the wavelength of light emitted by these excited atoms when returning to the ground state.