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Compute the molar concentration of Cu2+ for a solution prepared by mixing 25mL of 0.10 M CuCl2 with 25mL of 0.20 M NaOH.
the connection between the number of microstatesw and the entropy s of a system is expressed by the boltzmann
Fluoride (F-) is toxic element (anion) that can be lethal at 0.20 g/70kg of body weight. But because F- at low levels (1ppm) aids in healthy teeth, municipal water sources normally add this level of fluoride.
A backpacker wants to carry enough fuel to heat 2.7 of water from 30 to 100.0 . If the fuel he carries produces 36 of heat per gram when it burns, how much fuel should he carry? (For the sake of simplicity, assume that the transfer of heat is 100 ..
For a certain reaction, the standard free energy change is -80.0 kJ at 300 K and -40.0 kJ at 600 K. What is ΔS in J/K for this reaction, assuming ΔH and Δ S do not change with temperature
write the equations that illustrate how each pair of compounds can serve as a buffer pair. A) H2CO3 and NaHCO3 (the "carbonate" buffer in blood) B) NaH2PO4 and Na2HPO4
63.0 mL of a 1.20 M solution is diluted to a volume of 208 mL. A 104-mL portion of that solution is diluted using 157 mL of water. What is the final concentration.
Give equations to show how sulfuric acid can convert 4-methycyclohexene into a mixture of four isomeric C7H12 compounds (including starting material). Predict the relative amounts of each isomer.
dinitrogen pentoxide decomposes in chloroform as a solvent to yield nitrogen dioxide and oxygen gas. the decomposition
An air stream's humidity is increased by combining it with a stream of water as shown below (hr stands for relative humidity). The water evaporates and increases the moisture content of the air stream. Determine the mass flow rate of stream B
The dipole moment, meu, of HBr (a polar covalent molecule) is 0.82 D (debye), and its percent ionic character is 12.1%. Estimate the bond length of the H-Br bond in picometers.
a weather balloon has a volume of 750 l when filled with helium at 8 oc at a pressure of 380 torr. what is the new
How many milliliters of 0.200 M NaOH will be required to titrate 14.5 mL of 0.479 M H2SO4?
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