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Seawater has a density of 1.025 g/mL. If seawater is about 1.45% Cl by mass, how much 0.100M silver nitrate is needed to titrate a 5.00 mL sample?
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
Determine the wt./vol. % of Fluoride in toothpaste if the calculated molarity is 0.002491 M. The actual value is 0.15% so it should be somewhat close to this value. The density is 1.34 g/ml
What is the mass density of hydrogen relative to air at the same temperature and pressure? What mass of payload can be lifted by 10 kg of hydrogen, neglecting the mass of the balloon
The Ksp of lead(II) hydroxide, Pb(OH)2, is 1.43 × 10-20. Calculate the molar solubility of this compound.
Show that for the adiabatic reversible expansion of an ideal gas, T1^(Cv/R)V1 = T2^(Cv/R)V2
A temperature of a specific amount of gas in a sealed container changes from 20degC to 40degC. If the volume remains constant, the pressure will change from 720 mmHg to
If the pH probe was miscalibrated and reports the pH and reports the pH to be 1 unit higher than the true pH of the solution it is in, would the molar mass you report for the solid acid be higher than
. in the tin oxide laboratory activity what was the color of the vapor emitted when the nitric acid was added to the
How do you calculate molar enthalpy of combustion. For example if a question was simply " What is the molar enthalpy of combustion of propane." what would the formula/work be
A solution contining AgNO3 is mixed with a solution of NaCl to form a solution that is 0.10 M in AgNO3 and 0.075 M NaCl. What will happen once these solutions are mixed? Ksp(AgCl) = 1.77×10-10.
Beta sheets are a type of secondary structure in proteins. A segment of a single chain in an antiparallel. sheet has a length of 172 Å . How many residues are in this segment
the ratio of the number of nuclei in the first excited nuclear energy level to the number of of nuclei for a nucleus with ε1 - ε0 = 1MeV at 25C. At what temperature is kBT on the order of ε1 - ε0. Note 1MeV = 10^6eV
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