OC userin Chemistry·9 Dec 2017135. What relative masses of dimethyl amine and dimethyl ammo- nium chloride do you need to prepare a buffer solution of pH = 10.43?
OC userin Accounting·7 Dec 2017EXERCISE 12-12 Utilization of a Constrained Resource [L012-5] Benoit Company produces three products, A, B, and C. Data concerning the three products follow (per unit): Product 1 A ....... 2. $70 Selling price.......... Variable expenses: Direct materials Other variable expenses ..... Total variable expenses ........ Contribution margin .......... Contribution margin ratio .... de $21 30% 40% 25% Demand for the company's products is very strong, with far more orders each month than the com- pany can produce with the available raw materials. The same material is used in each product. The material costs $3 per pound with a maximum of 5,000 pounds available each month. Required: Which orders would you advise the company to accept first, those for A, for B, or for C? Which orders second? Third?
OC userin Mathematics·7 Dec 20172. Let A be an n x n matrix. Which of the following statements are TRUE? (i) If Ax = b has a solution for every beR", then Ax = 0 has non-trivial solutions. (ii) If A is invertible, then Ax = b has a solution for every beR" (iii) If A is invertible, then AP is also invertible. (A) (ii) only (B) (i) and (ii) only (C) (ii) and (iii) only (D) (i) and (iii) only (E) (i), (ii), and (iii)
OC userin Economics·7 Dec 201718. According to the principle of diminishing marginal utility, as consumption of a good increases, total utility A) decreases and then eventually increases. B) decreases at an increasing rate. decreases at a decreasing rate. increases at an increasing rate. increases at a decreasing rate.
OC userin Chemistry·9 Dec 201757. Which buffer system is the best choice to create a buffer with pH = 7.20? For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. HC2H302/KC2H302 NH/NH4Cl HCIO2/KCIO HCIO/KCIO
OC userin Economics·9 Dec 201724) If price falls below minimum average variable cost, the best a firm can do is A) stop production and incur a loss equal to total fixed cost. B) increase production and incur a loss equal to total fixed cost. C) stay at the same production level and incur a loss equal to the difference between total cost and total revenue. D) increase production and incur a loss equal to total variable cost. E) stop production and incur a loss equal to total variable cost.
OC userin Chemistry·8 Dec 201744. A heat lamp produces 32.8 watts of power at a wavelength of 6.5 um. How many photons are emitted per second? (1 watt = 1/s)
OC userin Chemistry·6 Dec 20175. The anion (S3N3] is a ring with alternating sulfur and nitrogen atoms. Complete the templates below by adding lone pairs and bonds to show the three BEST resonance structures for [S3N3] . Show all lone pairs of electrons as pairs of dots and all additional bonds as lines. Write any non-zero formal charges on the appropriate atoms. DH-01-10
OC userin Chemistry·8 Dec 201779. Many heterogeneous catalysts are deposited on high-surface area supports. Why?
OC userin Economics·7 Dec 2017The overproduction of a good means that A) deadweight loss has been eliminated. the sum of consumer surplus and producer surplus is greater than the sum for an efficient allocation. marginal cost exceeds marginal benefit. marginal benefit exceeds marginal cost. marginal benefit equals marginal cost.
OC userin Physics·6 Dec 20179.50 . (a) For the thin rectangular plate shown in part (d) of Table 9.2, find the moment of inertia about an axis that lies in the plane of the plate, passes through the center of the plate, and is parallel to the axis shown. (b) Find the moment of inertia of the plate for an axis that lies in the plane of the plate, passes through the center of the plate, and is perpendicular to the axis in part (a).
OC userin Economics·7 Dec 201740) The main difference between a tariff and an "equivalent" voluntary export restriction (VER) is that A) a tariff allows the government of the importing country to appropriate the extra market value of the imported good, but with a VER the extra market value accrues to the good's producers. B) a tariff allows the extra market value of the good to accrue to the supplier, but a VER allows the extra market value to be appropriated by the government of the importing country. C) a tariff restricts free trade between two countries and a VER does not. D) a tariff keeps the price in the importing country higher than it would otherwise be; a VER does not. E) none of the above.