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A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
Suppose that the microwave radiation has a wavelength of 13.2 cm. How many photons are required to heat 200. mL of coffee from 23°C to 62°C?
glycerol has a density of and a molecular weight of. If mL are mixed with a kg of water, what is a good estimate of the temperature at which this solution with freeze?
a 40.0 ml volume of ethane gas is heated from 25.0 celcius to 50.0 celcius. If the pressure remains constant, what is the final volume?
Compare the energy of a photon of wavelength 3.4 um with that of wavelength 0.155 nm. answer is in E1/E2
a corrosion technologist pipetted a 100 ml hard water sample and titrated it with 37.64 ml of 0.01 M EDTA solution for a total endpoint, and 29.32 ml of 0.01 M EDTA solution for a calcium endpoint.
How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7g Fe? Fe2O3(s) + 3CO(g) -> 3CO2(g) + 2Fe(s)
Which of the following is not true regarding social development?
If 3.0 ml of distilled water is added to 2.0 ml of 0.35 M CoCl2 solution , what is the concentration of the resulting solutions?
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
A buffer is made by dissolving H3PO4 and NaH2PO4 in water. Write and equation that shows how this buffer neutralizes added bases.
The standard free energy of formation of gaseous hydrogen iodide is 1.30 kJ/mol at 25°C. Find Kp for the reaction 2HI(g) -> H2(g) + I2(s) at this temperature.
Which of the following would be expected to have a bent (angular) shape?
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