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What is the pressure in atmospheres inside a container of gas connected to a mercury-filled open-end manometer when the level in the arm connected to the container is 28.0cm higher than the level in
For 0.51 M HCN (Ka=6.2 x 10-10), mark the majorand minor species found in the solution. H+ HCN CN- H2O OH- Now calculate the pH of 0.51 M HCN solution. (Ka=6.2 x 10^-10)
A solar panel is used to heat water in a tank. How much heat energy is needed to raise the temperature of 1000 L of water from an initial temp of 23 degrees Celsius to a final temp of 65 degrees Cel
The entropy change of the universe for any spontaneous process is always positive The equilibrium constant is always greater than one for an extensive reaction
Use tabulated thermodynamic data to calculate ?S° for the reaction: PbO2(s) + 2Ni(s) ? Pb(s) + 2NiO(s)
Calculate the wavelength of an 81kg athlete running a 4 minute mile. calculate in nanometers.
D=(KBT)/6 xpie xr x n The HIV-1 virus has a radius of about 50 nm. The viscosity coefficient of water at 20 °C is 1.00 mPa·s. How far will a particle of HIV-1 typically travel in 1 minute
What wavelength is expected for light composed of photons produced by an n=3 to n=1 transition in a hydrogen atom
Mass of sodium acetate: 3.472 g pH of Original buffer solution: 4.72 ph of buffer + 6 M HCl: 3.99 ph Buffer + 6 M NaOH: 5.23 And I need help showing calculations on pH of buffer solution, buffer + H
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal place
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC
The volume of HI(aq) required to reach the equivalence point : (1c) The pH at the half-neutralization point. (1d)The pH at the equivalence point.
Arrange the following isoelectronic series in order of decreasing radius, from largest to smallest Cl- p^3- Ca^2+ K+ S^2-
A mixture of Ar and N2 gases has a density of 1.491 g/L at STP. What is the mole fraction of each gas
Determine the number of valence electrons in each of the following elements. Ta Fe Cs
A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 67 s for 1.0 L of the gas to effuse. Under identical experimental condit
Calculate the equilibrium constant, Ka for the acid, HA if, at equilibrium, the pH of a 2.3 M solution of HA is 1.62
If a 0.10M aqueous weak acid solution has a pH of 2.50 what percentage of the acid is dissociated
How many electrons could occupy a subshell with the following quantum numbers? A) n=2, l=1 B) n=3, l=1, ml= -1
What is the pH of 0.10M methylammonium chloride, CH3NH3Cl(aq)
what is the wavelength of the photons emitted by hydrogen atoms when they undergo n=3 to n=2 transitions. Calculate in nanometers. In which region of the electromagnetic spectrum does this radiation
What is the pH during the titration of 25.00mL of 0.10M HAc(aq) using .10M NaOH(aq) as the titrant, after the addition of 10.0, 25.0, and 30.0ml of titrant.
What is the molar solubility of magnesium hydroxide: in water, in pH 12.00 buffer, and in 0.50M magnesium nitrate