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Have you ever wondered about how a frost-free refrigerator remains, well, frost-free? The key is sublimation During certain times, the freezer compartment is warmed slightly (the temperature is till well below 0 C). Molecules of water leave the surface of the ice and are removed by air blown through the freezer. Estimate the amount of heat (in kJ) needed to clean the freezer compartment of 88.5 g of ice. (DeltaH of fusion and Delta H of water are 6.01 kJ/mol and 40.79 kJ/mol, respectively)
The Ka value for acetic acid, CH3COOH (aq) is 1.8x10^-5 M. Calculate the pH OF 3.00 M acetic acid solution. Next, calculate the pH of the resulting solution when 2.501 mL of the 3.00 M acetic acid is diluted to make
An ice bag containing 324 of ice at 0deg C was used to treat sore muscles. When the bag was removed, the ice had melted and the liquid water had a temperature of 17.0 deg C.How many kilojoules of heat were absorbed?
If the average molar mass of a sample of soybean oil is 980 amu, how many grams of NaOH are needed to saponify 1.0 of the oil?
The standard free energy of activation of a reaction X is 89.4 kJ mol-1 at 298 K. Reaction Y is one million times faster than reaction X at the same temperature.
If the frequency of light emitted by potassium is 9.06E14 Hz, what is the corresponding wavelength associated with this frequency in nanometers
looking for a good introduction for this lab and any random data showing the results on how to calculate the equilibrium constant for the reaction shown above.
Calculate the de Broglie wavelength of an neutron moving at 1% the speed of light. Calculate the velocity of a neutron with a wavelength of 75pm.
the gaseous product of a reaction is collected in a 25L container at 27degrees celsiu. the pressure in the container is 300.0 kPa. how many moles of the gas are in the container.
When 24 mL of a 175 mL stock solution containing 1.6 M BaF2 is diluted to 70 mL, what is the concentration of Ba2+ in the new solution?
A compound contains atoms of three elements X, Y and Z.The oxidation numbers are X +2, Y +5 & Z -2.formula ? How can we formulate formula of a ternary compound using their valency?
If a message from flight control requires 170 sec to reach a satellite, how far in kilometers is the satellite from Earth?
Magnesium metal is used as a sacrificial anode to reduce the corrosion of underground storage tanks (made of iron, or more accurately, steel which is an iron/carbon alloy). As a result the sacrificial metal corrodes instead of the iron. Explain th..
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