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One of the commercial uses of sulfuric acid is in the production of calcium sulfate and phosphoric acid. If 25.0 g of Ca₃(PO₄)₂ reacts with an excess of H₂SO₄, what is the percent yield if 13.4 g of H₃PO₄ are formed in the following UNBALANCED chemical equation? Ca₃(PO₄)₂ (s) + H₂SO₄ (aq) → H₃PO₄ (aq) + CaSO₄ (aq)

An approximate model for a ceiling fan consists of a cylindrical disk with four thin rods extending from the disk's center, as in the figure below. The disk has mass 2.40 kg and radius 0.200 m . Each rod has mass 0.850 kg and is 0.860 m long. (a) Find the ceiling fan's moment of inertia about a vertical axis through the disk's center. (Enter your answer in \( \mathrm{kg} \cdot \mathrm{m}^{2} \).) \( \times \mathrm{kg} \cdot \mathrm{m}^{2} \) (b) Friction exerts a constant torque of magnitude \( 0.111 \mathrm{~N} \cdot \mathrm{~m} \) on the fan as it rotates. Find the magnitude of the constant torque provided by the fan's motor if the fan starts from rest and takes 15.0 s and 19.5 full revolutions to reach its maximum speed. (Enter your answer in \( \mathrm{N} \cdot \mathrm{m} \).) \[ \mathrm{N} \cdot \mathrm{~m} \]

write in a paragraph answer: How might the psychoanalytic and social-cognitive perspectives on early childhood development be integrated into a comprehension explanation of age-related changes during this period?

Ross is single. He purchased a new main home in March of 2017 for

. Ross will be itemizing his deductions. On what portion o

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Homer Company borrowed money by issuing

of

bonds payable at 102.8 on July 1, 2021. The bonds are five-year bonds and pay interest each January 1 and July 1. Read the requirements. How much cash did Homer receive when it issued the bonds payable? Journalize this transaction: When it issued the bonds payable, Homer received Requirements How much cash did Homer receive when it issued the bonds payable? Journalize this transaction. How much must Homer pay back at maturity? When is the maturity date? How much cash interest will Homer pay each six months? How much interest expense will Homer report each six months? Use the straight-line amortization method. Journalize the entries for the accrual of interest and the amortization of premium on December 31, 2021, and payment of interest on January 1, 2022. Get more help

can you show the solution for bits (e) to (h) of the problem statement? The result of your simulation should reveal that the temperature of the discarded dirty water is quite hot. It is proposed that this hot, dirty water be used to preheat the makeup water going into the boiler in an attempt to reduce fuel cost. This can be accomplished by adding a heat exchanger as shown in Figure P6.9B. It is reasonable to treat the heat exchanger as a counterflow regenerative heat exchanger. The mass flow rates of the water on each side are the same (the makeup water must replace the discarded dirty water). However, the heat capacities of the water on each side of the heat exchanger are slightly different. In reality, this difference is very small. Therefore, the thermal capacitance rate of each flow can be assumed to be equal without introducing too much error into the calculation. A heat capacity value of 1.01 \( \mathrm{Btu} / \mathrm{lbm} \cdot \mathrm{R} \) is a reasonable estimate of \( c_{p} \) for the water passing through the heat exchanger. The UA product of the heat exchanger is \( 9580 \mathrm{Btu} / \mathrm{h} \cdot \mathrm{R} \). Simulate this modified system and determine the following operating conditions: e. The temperature of the discarded dirty water f. The temperature rise of the makeup water as it flows through the heat exchanger g. The boiler heat transfer rate required to maintain continuous, steady-state operation (Btu/h) This particular system operates continuously throughout the year. The heat transfer rate is provided by the combustion of natural gas that costs \( \$ 0.70 / \) therm. (A therm is 100,000 Btu.) Determine the following: h. The annual energy cost savings realized by incorporating the regenerative heat exchanger as shown in Figure P6.9B. FIGURE P6.9B