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Consider a reaction where 27.0 grams of mercuric oxide (a red solid compound) is heated and completely decomposes to give the elements oxygen and mercury. IF 2.0 grams of oxygen is produced by this reaction, what mass of mercury is produced
Molecular beacons are nucleic acid strands that form hairpin loops. The stem region hybridizes to close the loop and the binding energy is ΔG = -22kJ/mole at 37°C.
a 30 g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. what is the momentum of the car?
The stopcock between a 3.00 L bulb containing oxygen at 295 torr and 1.00 L bulb containing nitrogen at 530 torr is opened. What is the total pressure of the mixture.
A mixture is prepared by adding 50.0 mL of 0.200 M NaOH to 75.0 mL of 0.100 M NaOH. What is the [OH-]? the answer is .140 M
the equivalence point i know you need to use [A-]= moles of HA/(vol water added+vol NaOH added) and believe moles of HA=5.39x10^-3
What is the final concentration of Na+ after adding 230 ml of water to a stock solution of 2.5M 420.0 ml Trisodium phosphate?
A fish tank holds 30.0 gal of water. Using a density of 1.0 g/mL for water, determine the number of pounds of water in the fish tank.
Calculate the standard enthalpy of the reaction, Delta(H) rxn}, for the thermite reaction: 2Al(s) + Fe2O3(s) ----> 2Fe(s) + Al2O3(s) Elements in their standard state have an enthalpy of formation value of zero
Draw resonance structures for 9-(hydroxymethyl)anthracene. Is it possible for all three rings to simultaneously have bensenoid
What pair of elements would you expect to exhibit the greatest similarity in physical and chemical properties? WHY?
A mixture of CO, CO2 and O2 is contained within a 275 mL flask at 0C. If the total pressure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2?
At saturation, 3.0 x 10-9 moles of AlPO4 have dissolved in 2 L of water. What is Ksp for AlPO4 at this temperature?
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