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The addition of 25.40g of an unknown metal at 90.0 C to 20.00g of water at 22.3C resulted in a final maximum temperature of the system of 26.8 C. Compute he specific heat of the metal.
use the activity series of metals to write a balanced chemical equation for this single replacement reaction
A gas mixture is made by combining 8.0g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 18.08L. What is the molar mass of the unknown gas
Titanium (f = 6.94 x 10^-19 J) and silicon (f = 7.77 x 10^-19 J) surfaces are iradiated with UV radiation with a wavelength of 207nm. Explain the wavelength of the electrons emitted by the titanium surface
the amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments. the amino group of
Ruthenium red can be used as a tissue stain for microscopy. It contains 38.56% ruthenium by mass. If each molecule of ruthenium red contains 3 ruthenium atoms, what is the molar mass of ruthenium red
The equilibrium constant Kc for the decomposition of phosgene, COCl2, is 4.63 x 10^-3 at 527 deg. C
calculate the percent of radioactive parent atoms remaining 2 hours after medicine is administered. the percent is the
If a car has an EPA mileage rating of 30 miles per gallon, What is this rating in km L-1? 1 liter = 1 dm3, 1 gallon = 3.785 liter, 1 mile = 1.609 km.
Among the nisomeric alkanes of formula C5H12, give the structural formula for the one, that when reacted with Cl2/light yields
Many people have 900 MHz phones where this refers to the frequency of radiation it uses to communicate. What energy does this correspond to (in joules/photon)
A reaction has a rate constant of 0.0591 sec-1, how much of the compound (in mol/L) is left after 5.03 sec, if there was 0.770 mol/L at the start
What are the major species present in 0.250 M solution of each of the following acids. Calculate the pH of each of these solutions.
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