100 kg of a mixture of sodium sulfate crystals (Na2S0410 H2O) and sodium chloride (NaCl) is heated to drive away all the water. Final weight of the dry mixture is 58.075 kg. Calculate the mass of sodium sulfate crystal and sodium chloride in the original mixture. b. Calculate the molar ratio of dry NaSO4, and NaCl in the original mixture.

Q3. Péclet number – We've seen the Péclet number Pé = vl as a useful metric to D determine if stirring (Pé > 1) is more efficient than diffusion (Pé < 1) for mixing solutions. "Stirring" here can designate any process which applies a force on the molecules, resulting in a velocity v. a) Show that the Péclet number, like the Reynolds number, is unitless. Let's think about why scale (f) matters for mixing. 1-DNA, a DNA polymer containing 48,502 base pairs, has a diffusion coefficient of D = field of 1 V/m, we can expect 1-DNA to reach a terminal velocity of 30 nm/s. 6.4 x 10-13m²s=1. Under an electric

At −12.0 ∘C−12.0 ∘C, a common temperature for household freezers, what is the maximum mass of maltitol (C12H24O11) you can add to 2.50 kg2.50 kg of pure water and still have the solution freeze? Assume that maltitol is a molecular solid and does not ionize when it dissolves in water. Consult the table of ?fKf values.   Solvent Formula K f value* (°C/ m ) Normal freezing point ( °C)   K b value (°C/ m ) Normal boiling point ( °C)  water  H 2 O  1.86  0.00  0.512  100.00  benzene  C 6 H 6  5.12  5.49  2.53  80.1  cyclohexane  C 6 H 12  20.8  6.59  2.92  80.7  ethanol  C 2 H 6 O  1.99 –117.3  1.22  78.4  carbon tetrachloride   CCl 4  29.8  –22.9  5.03  76.8  camphor   C 10 H 16 O  37.8  176

A solution containing sodium fluoride is mixed with a solution containing cadmium nitrate to form a solution that is 0.0050 M in NaF and O.00250 M in Cd(NO3)2. If the Ksp for CDF2 is 6.44x10-3, then Q > K and a precipitate of CDF2 will form. O Q < K and more CDF2 will precipitate since the solution is not supersaturated. O Q < K and CdF2 does not precipitate. Q = K and the system is at equilibrium.

One half-cell in a voltaic cell is constructed from a copper wire electrode in a 4.0 x 10-8 M solution of Cu(NO3)2. The other half-cell consists of a zinc electrode in a 0.75 M solution of Zn(NO3)2. Calculate the cell potential. You may need to use the following data: Zn²+ (aq) + 2 e¯ + Zn(s) E° = -0.763 V Cu²+ (aq) + 2 e → Cu(s) E° = +0.337 V Potential =

2. Carbon nanotubes (CNT) are among the most versatile building blocks in nanotechnology. These unique pure carbon materials resemble rolled-up sheets of graphite with diameters of several nanometers and lengths up to several micrometers. They are stronger than steel, have higher thermal conductivities than most known materials, and have electrical conductivities like that of copper but with higher current- carrying capacity. Molecular transistors and biosensors are among their many applications. While most carbon nanotube research has been based on laboratory-scale synthesis, commercial applications involve large industrial-scale processes. In one such process, carbon monoxide saturated with an organo-metallic compound (iron penta- carbonyl) is decomposed at high temperature and pressure to form CNT, amorphous carbon, and CO2. Each "molecule" of CNT contains roughly 3000 carbon atoms. The reactions by which such molecules are formed are: Decomposition of Fe(CO)s to form iron, which…

An Al-4.5wt%Cu alloy has a low-temperature yield stress of 600 MPa due to the precipitation strengthening effect imparted by the equilibrium q phase (Al2Cu) precipitates. Estimate the interparticle spacing and particle size in this alloy. Given: density of α-solid solution 2,700 kg/m3 and density of q phase 4,430 kg/m3. Assume the Cu content in α-solid solution 0.5 wt% and the Cu content in the q phase 54%.   Hint: You need to use the Orowan model of particle strengthening and the lever rule among other concepts.

A liquid is fed to a distillation column at 4 atm absolute pressure. Its composition as a mole fraction is: n-butane: 0.40, n-pentane: 0.25, n-hexane: 0.20, n-heptane: 0.15. Using the equilibrium distribution coefficients (K), find the temperature at which this liquid will begin to boil (bubble temperature). Calculate the concentration of the first vapor bubble formed.

Please don't provide handwriting solution

Calculate the change in enthalpy ΔH for 100 kg of material undergoing the following temperature and phase changes.  Show your calculations in detail (including the integrations) type them out in word. Ammonium sulfate (crystalline) heated from 10 °C to 40 ° Heat Capacity, i think i did it wrong, i used the values on the bottom table, i think im supposed to use value from the top...