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A voltaic cell consists of a standard H2 electrode in one half-cell and a Cu/Cu2+ half-cell. Calculate [Cu2+] when Ecell is 0.25 V
A green leaf has a surface area of 2.00 cm^2. If solar radiation is 1030 W/m^2, how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
what is the equilibrium pressure of hydrogen sulfide if the equilibrium pressure of hydrogen is 0.103 atm and the equilibrium pressure of sulfur is 0.417 atm?
Assuming that all of the sulfate and nitrate originated as acids. calculate the expected pH of this rain water.
calulate the molarity of acetic acid in a venegar sample knowing that 5.00mL of vinegar requires 43.50mL of 0.105 M NaOH to reach the phenolphthalein endpoint in a titration
energy to heat a certain sample of pure silver from 12.0 C to 18.2 C. Calculate the mass of the sample of silver.
what is the density of 53.4 wt% aqueous NaOH if 16.7 mL of the solution diluted to 2.00L gives 0.169M NaOH
A certain metal, M(s), reacts with O2(g) to form M3O4 (?H°f = -418 kJ/mol). What is ?H° in kJ for a reaction where 2.32 mol of M and excess oxygen form M3O4
exactly 16.9mL of EDTA are required to reach the EBT endpoint. calculate the total hardness in ppm CaCO3.
a 130g piece of metal is heated to 286C and dropped into 87.0g of water at 26C, if the final temperature of the water is 58.3C.
The steam is then sent back to the boiler (constant pressure heat exchanger) and reheated to 300oC. In a secondary turbine, the steam is expanded to 10kPa.
A fixed quantity of gas at 24 C exhibits a pressure of 745 torr and occupies a volume of 4.40 L. Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.88 atm while the temperature is held constant.
Write the reaction between Fe3+ and SCN- in which [Fe(SCN)3] forms. b) Determine the equilibrium expression for K associated with this reaction
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