OC userin Physics·30 Nov 201755. Use data from Appendix IIB to calculate ASxn for each of the reactions. In each case, try to rationalize the sign of ASx a. C2H4(3) + H2(g) →→ CH68) b. C(s) + H2O(g) — CO(g) + H2(g) c. CO(g) + H2O(g) — H2() + CO2(8) d. 2 H,S(g) + 3 02(g) 2 H2O(l) + 2 SO2()
OC userin Chemistry·1 Dec 20171. What is Brownian motion? How is it related to the development of the idea that matter is particulate?
OC userin Physics·2 Dec 201733. How is the amount of current flowing through an electrolytic cell related to the amount of product produced in the redox reaction?
OC userin Chemistry·30 Nov 2017109. Consider the stack of pennies in the previous problem. How much money in dollars) would this represent? If this money were equally distributed among the world's population of 7.0 billion people, how much would each person receive? Would each per son be a millionaire? A billionaire? A trillionaire?
OC userin Chemistry·2 Dec 201793. Determine whether the two structures are isomers or the same molecule drawn in two different ways. a. CH3-CH=C0–CH, | CHG-0–0–CH3–CH, C. CH3-HC-CH-CH3 CH3 CH3 CH3 CHI-HC-CH=CH, CH3
OC userin Physics·2 Dec 201725.25. A copper transmission cable 100 km long and 10.0 cm in diameter carries a current of 125 A. (a) What is the potential drop across the cable? (b) How much electrical energy is dissipated as thermal energy every hour?
OC userin Chemistry·29 Nov 201742. Which statements are inconsistent with Rutherford's nuclear theory as it was originally stated? Why? a. Since electrons are smaller than protons, and since a hydro- gen atom contains only one proton and one electron, it must follow that the volume of a hydrogen atom is mostly due to the proton. b. A nitrogen atom has seven protons in its nucleus and seven electrons outside of its nucleus. c. A phosphorus atom has 15 protons in its nucleus and 150 electrons outside of its nucleus. d. The majority of the mass of a fluorine atom is due to its nine electrons.
OC userin Chemistry·28 Nov 2017110. Which is more efficient, a butane lighter or an electric lighter (such as the ones traditionally found on the dashboard of auto- mobiles)? Explain.
OC userin Chemistry·28 Nov 201717. In a reaction mechanism, what is an elementary step? Write down the three most common elementary steps and the corre- sponding rate law for each one.
OC userin Physics·28 Nov 2017103. Nuclei with the same number of neutrons but different mass numbers are called isotones. Write the symbols of four isotones of 236 Th.
OC userin Chemistry·29 Nov 2017Q6. A reaction has AHpx = -255 kJ and ASix = 211J/K. Calculate AG xn at 55 °C. a) 11.9 X 10 kJ b) 69.5 X 10 kJ c) -267 kJ d) -324 kJ
OC userin Physics·28 Nov 201762. Calculate Ecell for each balanced redox reaction and determine if the reaction is spontaneous as written. a. O2(g) + 2 H2O(1) + 4 Ag(s) — 4OH(aq) + 4 Agt(aq) b. Br (1) + 2 (aq) — 2 Br (aq) + 12(s) c. PbO2(s) + 4H+(aq) + Sn(s) — Pb2+ (aq) + 2 H2O(l) + Sn²+ (aq)
OC userin Accounting·26 Nov 2017EXERCISE 7-5 Product and Customer Profitability Analysis [LO7-4, L07-5] Thermal Rising, Inc., makes paragliders for sale through specialty sporting goods stores. The com- pany has a standard paraglider model, but also makes custom-designed paragliders. Management has designed an activity-based costing system with the following activity cost pools and activity rates: Activity Cost Pool Activity Rate Supporting direct labor ........ Order processing ........ Custom design processing. Customer service ........ $26 per direct labor-hour $284 per order $186 per custom design $379 per customer Management would like an analysis of the profitability of a particular customer, Big Sky Outfit- ters, which has ordered the following products over the last 12 months: Standard Model Custom Design 20 Number of gliders ......... Number of orders Number of custom designs ..... Direct labor-hours per glider ....... Selling price per glider ... Direct materials cost per glider ..... www 26.35 $1,850 28.00 $2,400 $634 $564 The company's direct labor rate is $19.50 per hour. Required: Using the company's activity-based costing system, compute the customer margin of Big Sky Outfitters.
OC userin Physics·26 Nov 2017Q5.11 In a world without friction, which of the following activi- ties could you do (or not do)? Explain your reasoning. (a) Drive around an unbanked highway curve; (b) jump into the air; (c) start walking on a horizontal sidewalk; (d) climb a vertical ladder; (e) change lanes while you drive.