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A weather balloon had a volume of 750 L when filled with helium at 8•c at a pressure of 385 torr. What is the new volume of the balloon when the pressure is 0.205 atm and the temperature is at -45•c?
What is the minimum number of conversions that need to be done across a peak to achieve a reproducibility (relative standard deviation) of less than 1% for repeated measurements of the same peak
A gaseous reaction takes place at a constant pressure of 50.0 atm and releases 57.7 kJ of heat. Prior to the reaction, the volume of the system was 8.80 L. subsequent to the reaction, the volume of the system was 2.60 L.
For an enzyme that displays Michaelis-Menten kinetics, what is the reaction velocity, v(as a percentage of Vmax), observed at
Acetic acid can be manufactured by combining methanol with carbon monoxide, an example of a carbonylation reaction: CH3OH(l) + CO(g) → CH3COOH(l), Calculate the equilibrium constant for the reaction at 25 °C.
Problem- NaOH is added to sea water containing 0.050 moles per litre of Mg 2+ ion until the pH reaches 11.0. A certain quantity of Mg(OH)2 precipitates. What is the concentration of the magnesium ions remaining in the solution, in moles per litre
A bottle of wine consists of an 11 weight percent solution of ethanol (C2H5OH) in water. If the bottle of wine is chilled to -20^oC, will the solution begin to freeze
A cell based on the reaction below has a standard potential of +0.42 V at 25°C. If all of the species are at standard conditions except [H+], at what pH will the cell have a potential of zero
FeCl3 and Mg3(PO4) to give FeSO4 and MgCl2 I need to know what are the : Molecular Equation? Ionic Eq? Net Ionic Eq? What is the name of this type of reaction. Which ions are spectator ions
Calculate the percent dissociation of the acid to 3 significant figures. % ============= 2. The pH of a 4.28×10-3 M solution of a weak base that will accept only one proton is 7.17. Calculate the percent dissociation of the base to 3 significant f..
A vessel containing 45.0 cm3 of helium gas at 25°C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium.
Sulfuric acid has a dual role in the chemistry. What are its two roles in the recovery of copper metal
what is the oxidation number of the specified element in each compound or polyatomic ion: a)C in ZnCO3 b)Fe i Fe(NO3)2 c)Cl in ClF4^- d)S in S2O3^2-
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