3.106 Copper is an excellent electrical conductor widely un in making electric circuits. In producing a printed circ board for the electronics industry, a layer of copper laminated on a plastic board. A circuit pattern is th printed on the board using a chemically resistant pc mer. The board is then exposed to a chemical bath t reacts with the exposed copper, leaving the desired c per circuit, which has been protected by the overlay polymer. Finally, a solvent removes the polymer. One action used to remove the exposed copper from the cuit board is Cu(s) + Cu(NH),Cl2(aq) + 4 NH3(aq) - 2 Cu(NH3)CH A plant needs to produce 5000 circuit boards, each w a surface area measuring 2.0 in. x 3.0 in. The boards covered with a 0.65-mm layer of copper. In subsequ processing. 85% of the copper is removed. Copper he density of 8.96 g/cm'.Calculate the masses of Cu(NE Cl2 and NH3 needed to produce the circuit boards. suming that the reaction used gives a 97% yield.

How long would it take to plate 6.49 g of nickel onto copper using a 2.0 V power supply with a 437 mA current flow and 0.50 M nickel (II) acetate solution? time in (hr)

·25% b.5.0% C.I0% d 50% this reaction Consider 3Mg+2H3PO > Mg(PO)2+3 Hz * how many gram S Of magnesiumonosenate snould be producediF 5.4o grams Of magm re00+with excess nosphori OOCI0 a75 gra m b9.5grams C58.49rams d 1.80 grams esiun

A coil with 193 turns has a magnetic flux of 37.3 nT-m² through each turn when the current is 1.90 mA. (a) What is the inductance of the coil? What are the (b) inductance and (c) flux through each turn when the current is increased to 3.53 mA? (d) What is the maximum emf & across the coil when the current through it is given by i = (2.72 mA)cos(wt), where w = 205 rad/s? (a) Number 3.788894737 Units mH (b) Number 3.788894737 Units mH (c) Number i 6.929947369 Units nWb (d) Number i 2.112687705 Units V