請問第18題答案為什麼選擇B?

(B) 18. The art gallery is only open on Saturdays and Sundays. (B) In other words (A) For one thing (C) 19. A good chef has to keep sampling all kinds of ingredients (B) in case (A) as if , it is closed on weekdays. (C) Sooner or later (D) To begin with he or she can create new recipes. (D) such that (C) so that

想請問第一式變到第二式的過程 謝謝

x³-4x²+3 X-3 Rewrite the fraction using partial- fraction decomposition dx Explain how ➜ Sx 2 X-X-3+ -6 3+-+-3 -dx X ? Why

求題目的過程與解答，問題四延續問題三，謝謝

Problem 3 Creating a 0.1 Normal Solution Suppose you must determine the amount of hydrogen halides (HCI, HBr and HF) in the flue gas leaving a chemical reactor. The emission sampling train for hydrogen halide determination calls for a total of 200 mL of 0.1 N H₂SO4 as an absorbing solution. The absorbing solution will be located on the impingers of the sampling train. How many grams of H₂SO4 should be added to water to create 200 mL of a 0.1 N H₂SO4 solution? > The chemical reaction of H₂O and H₂SO4 is as follows: H₂SO4+H₂O 2H++SO₁²+H₂O 4 > Approximate atomic weights of elements: H=1, S=32, O=16

有哪位大神可以寫過程給我嗎🙏🙏

Let P(X = x) = 1-3 1-3 , 13₁ x = 74 1 , x = 5 3 x = 8 (1) Obtain μ, o² (**)< (2) Obtain the sampling distribution of X for sample size 34 (3) Obtain E(X), Var (X). Does E(X) = µ? Does Var (X) = ²? Show your n answers.(數字要算出來)

第二小題這樣寫對吧？

(1) Please write down the energy balance equations (2) The initial state of an ideal gas mixture was 500K, and 30 bars. Next, the temperature was reduced to 300K. Assume that the mole fraction of A was 40%, Please calculate the partial pressure of species A in the mixture at its final state. (2%) (3) Please describe Carnot's Theorem and the Third law of Thermodynamics and. (2%) (4) Please describe the differences between ideal gas and real gas (2%) (5) In Van der Waals equation of state, please describe the meaning of parameter "a" and "b" 100

想問第4題畫線處 分母(tan²x)-1 =(sin²x/cos²x)-1 =(sin²x-cos²x)/cos²x 為什麼把1/cos²x移到分子以後 分母不是sin²x-cos²x ? 感謝！

x² Example 4 Find lim x 0 sec X 1 SOLUTION The evaluation of this limit requires a little imagination. Since both the numerator and denominator tend to zero as x tends to zero, it is not clear what happens to the fraction. However, we can rewrite the fraction in a more amenable form by multiplying both numerator and denominator by sec x + 1. x2 x² sec x 1 lim x-0 secx 1 - = = x2 sec x 1 - x² (secx + 1) sec² x 1 lim (sin x-0 sin x sec x + 1 sec x + 1) - = Since each of these factors has a limit as x tends to 0, the fraction we began with has a limit: = x² (secx + 1) tan² x - 1 x² cos²x(secx + 1) sin² X 2 (*) ² (cos²x)(secx + 1). 2 ·lim cos²x lim (secx + 1) = (1)(1)(2) = 2. x→0 x ●

莫耳分率

Calculate the mole fraction of sucrose molecules, C12H22011, in 1.22 m C12H22011(aq). [Answer: 2.15 x 10-²1

請問第9題濃度換算⋯不懂為何答案差這麼多

the molality? (A) 0.1775m H₂SO 7.75 198⁰ mol (D)1.940m H₂SO4⋅ CM = =1.9435m (100x1.1094-1775) X103³kg 9. A typical commercial-grade acetic acid is 36% CH3COOH by mass and density (A 1.05g/mL. Calculate the molarity (mol/L) of the CH3COOH. (A)6.3M (B)12M (C)17M (D) 18M. 36/60 c.nl M (103台大C) 100X105X10-3 cha y 201 iter (C)mole fraction (D) (E

請問如和從上式變到下式🙏🙏

lo F - ate .2 MAX 1 - x + 2x2 – x3 EXAMPLE 8 Evaluate dx. x(x2 + 1)2 50191911 SOLUTION The form of the partial fraction decomposition is 1 - x + 2x2 – x3 x(x2 + 1)2 + A Bx + c + X x² + 1 w Dx + E (x2 + 1)2

請問這題的丙不是在說內質網嗎 為什麼選 謝謝

第24、25題為題組 細胞離析法(cell fractionation)為可以將細胞內的構造分離,以方便研究個別構造 的方法。首先,將組織細胞利用果汁機打碎,經過震盪後,使細胞碎片及細胞構造均匀 分散於溶液中,再利用離心機進行離心。下表是取某細胞進行離析的結果,請根據下表 回答下列問題: (固:g代表重力倍率) 離心力(g) 離心時間(分鐘) 代號」沉澱物的觀察 物 1000 10 甲 雙層膜,膜上具小孔的球狀構造 自 有兩種構造,一為雙層膜構造,且沉澱物呈綠// 20000 20 Z 色,另一構造為雙層膜呈短棒狀,柱形。 有膜扁、比 有兩種構造,單層膜扁囊狀構造、單層膜網狀 80000 60 丙 構造 內实 150000 180 丁 由兩個單元組成的顆粒狀構造 办?A 影:資料分析 9