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Lab results show that our Aluminum spooled weld wire has an Aliphatic hrdrocarbon lubricant present. The lubricant is causing porosity (pin-holes) in our completed welds. Can the lubricant be remved by heating the spooled wire to some temperature? If so what temp and how long should it be held at the temperature? Is there another method for removal without removing the wire from the spool and cleaning (e.g. with denatured alcohol)?
Tabulate the viscosity and density of water between the temperatures of 10 degrees and 80 degrees, in one degree increments in the 20 to 35 degrees interval and in 5 degrees increments outside this interval
The temperature of 1.5 kg of ethanol is 37°C. What will the final temperature be if 80,000 J of energy as heat is added to the ethanol.
The volume of the gas is measured 201 mL at .989 atm. compute the number of grams of Na used in the reaction if Vapor pressure of water = 0.0277 atm
A compound, C7H12O4, has an IR spectrum showing a peak at 1735 cm-1. Its 1H NMR spectrum has peaks at delta 1.3 (6 H, triplet), 3.4 (2 H, singlet), and 4.2 (4 H, quartet). Draw its structure
If 4 liters per minute of 100 ppm 1,1,2-trichloroethane solution is to be reduced by 99% in a diffused air CSTR, what air flow is required if equilibrium is assumed. What air flow is needed for 90% removal
a gas is heated from 255 k to 284 k while its volume is increased from 24.0 l to 32.0 l by moving a large piston within
Write equations for the folowing seperations. indicate any condition required for the reactions to occur, such as p.H 5. Fe2+ and Cr3+ ions from Ni2= ion
Which one of the following pairs is a conjugate acid-base pair?
the vapor pressure of a substance describes how readily molecules at the surface of the substance enter the gaseous
Observe the d-orbitals on a central metal and use the character table to derive their irreducible representations (remember which column to look at). Circle any that are nonbonding for sigma interactions.
Calculate the molar concentration of illinic acid and of its conjugate base illinate ion (in moles/L; M) in a 3 M illinate buffer at pH 7.5. The pKa of illinic acid is 6.7.
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) 2HI(g) Kc=53.3 At this temperature, 0.800 mol of H2 and 0.800 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present..
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