Follow the steps of the Systematic Approach of Section 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, (3) construct a schematic diagram with inputs and outputs, (4) Label known material quantities or rates of flow and so on. The Lena Chemical Co. concentrates leftover acids from various chemical processes. Leftover acid from a nitrating process contains 24.0 percent nitric acid (HNO3), 55.0 percent sulfuric acid (H2SO4), and 21.0 percent water (H2O). This acid is to be concentrated (strengthened in acid content) by adding sulfuric acid with 92.0 percent H2SO4 and nitric acid containing 89.0 percent HNO3. The final product is to contain 31.0 percent HNO3 and 58.0 percent H2SO4. Compute the mass of the initial acid solution and the mass of the
concentrated acids that must be combined to produce 2.00(10³) lbm of the desired mixture.
What will be an ideal response?
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A groove 7/8 inch deep is to be milled in a steel plate. How many cuts are required if each cut is 3/32 inch deep?
What will be an ideal response?
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List five different types of control loops.
Fill in the blank(s) with the appropriate word(s).
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Find the numerical value of the following factors by (a) linear interpolation, (b) using the appropriate formula, and (c) a spreadsheet function.
1. (F?A,19%,20) 2. (P?A,26%,15) What will be an ideal response?
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Which part of the nozzle produces the correct firing rate?
A) Spray pattern B) Spray angle C) Cone D) Orifice
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