求問這題的c小題

4. A solid mixture of Na2SO4 and K2SO4. A 0.205 g of sample of the mixture is dissolved in water. A excess of an aqueous solution of BaC12 is added. The BaSO4 is formed is 0.289 g. a. What mass of SO4-2 ion is in the sample? b. What is the mass percent of SO4-2 ion in the sample? c. What are the percent compositions by mass of Na2SO4 and K2SO4 the sample? a. 0.123 g of SO4-2 ion b. 60% of SO4-2 ion c. the mixture is 61% K2SO4 and 39% Na2SO4

大一普化求救ಥ⁠_⁠ಥ

3.49 x 10-7 m h²h² 5-h E = 8m²z 8mL² 2 Q: What is the total probability of finding a particle in a one-dimensional box in level n = 4 between x= 1/4L and x = 5/8 L he K

答案如圖

9.47 A frictionless pulley has the shape of a uniform solid disk of mass 2.90 kg and radius 10.0 cm. A 1.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig. E9.47), and the system is released from rest. (a) How far must the stone fall so that the pulley has 3.30 J of kinetic energy? (b) What percent of the total kinetic energy does the pulley have? 01442m 47.6% Figure E9.47 T M mg 10 A 116 1.50 kg stone 2.9 2.50 kg pulley

答案如圖

9.47 A frictionless pulley has the shape of a uniform solid disk of mass 2.90 kg and radius 10.0 cm. A 1.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig. E9.47), and the system is released from rest. (a) How far must the stone fall so that the pulley has 3.30 J of kinetic energy? (b) What percent of the total kinetic energy does the pulley have? 01442m 47.6% Figure E9.47 T M mg 10 A 116 1.50 kg stone 2.9 2.50 kg pulley

答案都是8.79

9.21 A wheel of diameter 20.0 cm starts from rest and rotates with a constant angular acceleration of 3.50 rad/s². Compute the radial acceleration of a point on the rim for the instant the wheel completes its second revolution from the relationship (a) arad w'r and (b) arad = v²/r. =

請問這一題要怎麼寫？先謝謝點進來的人❤️‍🔥🙏🙏🙏

20. BIO A setup similar to the one shown in Figure P4.20 is often used in hospitals to support and apply a horizontal traction force to an injured leg. (a) Determine the force of tension in the rope supporting the leg. (b) What is the traction force exerted to the right on the leg? 70° 8.00 kg Figure P4.20

想請問這題是如何解出來的？ 手寫的圖是我嘗試解的過程，但沒有解出答案，麻煩大家了🫠

21. A metal ion in a weak-field octahedral complex has two more unpaired electrons than the same ion does in a strong-field octahedral complex. Which of the following could the metal ion be? (A) Cr³+ (B)Mn²+ (C)Co²+ (D)Ti²+ (E)Cu²+

請問這題的b、c小題怎麼解？ a小題應該是相吸（？

7. 兩長直導線的線質量密度為入被兩繩平行垂吊,兩導線相距為 d(如圖4)。兩導線連結一電容 C,電容電量初始值為±Qo。假設整體線路的電阻值為R,請問當電容開始放電 (a) 兩長直導線受力為 相吸或相斥?(5%) (b) 求導線受力後的初速度vo ? (5%) (c) 兩導線受力後高度提高為h= ? (5%) 圖4 d

請問Mass光譜切割到最後 剩下的基團怎麼寫？ 切下乙烯、C=O後 剩下的基團要怎麼標示？ 分子量剩下55，是C3H5N 這是什麼基團或是結構嗎？

Relative Intensity 100 80 40 MS2008-03710CW 0 mm 83 20間距相差55m/Hz,可知可能為 111m/z出現訊號,可推 測分子量可能為111 111 間距相差28m/Hz,可知可能為-CH=CH(乙烯基) 55間距相差28m/Hz,可知可能為C-0 50 v/tbn/pyntyy.................... 100 150 m/z 200 250 28 28 55 NH2

想請問C D選項 謝謝

44 假如某人比較了被演化時序分隔之兩種生物體(譬如人類和酵母菌)的細胞色 素c(cytochrome c)的一級結構,則他將發現 A. 該蛋白質分子之整體三級結構有顯著的差異 B. 親水性胺基酸通常取代疏水性胺基酸 C. 該蛋白質已演化出不同的功能 D.這兩蛋白質分子間存在有極高的序列相似性 E. 其一級結構中沒有任何變異存在 Ć