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A pure gold ring, weighs 27.8 g, is heated to 123 C and then tossed into a coffee cup calorimeter contain 50.00 mL of pure water at 23.1 C. assuming no heat transferred between the cup and the surroundings, what is the temperature of the water after teh ring and water reach thermal equilibrium
How many spectra must be averaged in order to increase the signal-to-noise ratio of a spectrum from 7/1 to 20/1? i took 20/7 and squared
Explain the hybridization of carbon in C2H2 using electron configuration diagrams of the original atoms, excited staes
The hydrogenation of Oleic acid to a steric acid. we used 10% pd/c, ammonium formate, mentanol, dichloromethane, 95% ethanol, and 1M sulfuric acid to get steric acid.
A perfectly square piece of gold foil measuring 3.3 mm on an edge is isolated from a bottle of liqueur
the temperature of a 2.0 liter sample of heluim gas at STP is increased to 27 celsius and the pressure is decreased to 80.0 kPa. what is the new volume of the helium sample.
A 15.0 L flask contains 2.00 moles of N2 and 6.00 moles of H2 at 728 oC. A. Before any reaction takes place, what is the partial pressure of N2 in the flask?
A student was given a standard Fe(s) | Fe2+(aq) half-cell and another halfcell containing an unknown metal M immersed in 1 M MNO3(aq).
If the synthesis of 1.0 mol of ATP requires a ?G of 37.7 kJ, how many moles of ATP are synthesized per mole of oxygen consumed
if a raindrop weighs 60. mg on average and 5.1 105 raindrops fall on a lawn every minute what mass in kg of rain falls
compute the pressure in atmospheres using the van der waals equation exerted by waterh2o of 23.93 grams at 36.11 degree
Calculate the binding energy E B of the helium nucleus 4 /2 He .Express your answer in millions of electron volts to four significant figures.
Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in a 100 mL of a 100 mM Tris-HCl buffer solution at pH 8.1? Note that the 100 mM refers to the sum of Tris and Tris-HCl concentrations.
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