想問為什麼要算蒸氣壓可以用純水的去減之後就得出來？ 還有（3）的分子量要怎麼算 謝謝！！🙇🏻‍♀️🙇🏻‍♀️

劇 ] 範例 | 拉午耳定律;非揮發性、非電解質溶質的正 With hil 25℃時,如圖所示,將純水以滴管注入乙汞槽中的玻璃管 內; 及將含某非揮發性、非電解質溶質X且重量百分率濃 真空- 度為50% 的水溶液以滴管注入丙汞槽中的玻璃管內,分別 與甲比較。試問: (1)純水的蒸氣壓為多少 mmHg ? 24mmHg / 洗5 (2)50% 水溶液的蒸氣壓為多少mmHg? 16mmHg (3)X 的分子量為多少? 汞 甲 水蒸氣 760 mm 純 純水 736 mm ZA 24 水蒸氣 溶液 K 744 mm 16 (1)

請問有人會嗎？？急！

已知常溫常壓下,A 氣體與B氣體化合生成安定之C氣體,其體積比A : B : C = 3 : 1:3,下列 敘述何者正確? 3A+B→3C (A)A、B、C 氣體均不可能為單原子分子 (B)B 氣體-分子中含有之原子數必為3之倍數 (C)B 氣體-分子中最少含有三個原子 (D)若 B 氣體含有奇數個原子,則A與C中必有一種含奇數個原子 (E)若 B 氣體含有偶數個原子,則A與C亦必含有偶數個原子。｣ 74 ← with chr D 上 Rth 【96 中崙】(B)(C)(D) stry

請問這題為什麼D選項的鋁跟錳離子可溶呢

2+ 12. Consider a solution containing the following cations: Na, Hg²+, Mn²*, Al³+ and Ag. Treatment of the solution with dilute HCl followed by saturation with H₂S results in formation of precipitate(s). Which ions still remain in solution ? Hg Cut Pb Agt TI 7 DE TA. 2A, NH4+ J + + (A.) Ag only; (B.) Na*, Hg²+, Al³+; (C.) Ag* and Hg²+; Na+, Al³+, and Mn²; Nat only

請問這題酸鹼滴定要怎麼算 卡了很久還是想不出來 如果是當量點的話H+ OH-莫耳數不是相同嗎 這樣不是PH=PKa嗎

BA 48. Calculate the pH at the equivalent point in the titration of 40ml of 0.025M benzoic ↳ 苯甲酸 CH602 84+6+32 acid(Single proton acid) with 0.5M NaOH. (Ka of benzoic acid = 6.3x10-5) A6.50 (B) 8.21 (C)10.01 (D) 7.30 [base). PH= Pka + hoy (12121212 = Pkat bay Tacid) (m) mx份起 0.025x0,04x122 122 .C-OK =122

想請問這題怎麼寫～

1. Compare the products formed by the reaction formed when the following compound reacts with Br, in the presence of an organic solvent versus water.

11.救一下感恩

(A) [OH]> [H] (B) [H] > [OH ] (C) the water is no longer neutral (D) none of these is correct. 11. A 100.0-mL sample of 0.2 M (CH3)3N (Kb = 5.3 x 105) is titrated with 0.2 M HCI. What is the pH at the equivalence point? (A) 5.4 (B)7.0 (C) 10.3 (D) 3.1 (E) 9.9 17 You have a solution of 0 10 MC5 and 0.10 M Cr0.² You add 0 10 M silver nitrate dropwise into

第二張是解答，問最後一個步驟，怎麼看？

7-72 Reaction of 2,3-dimethyl-1-butene with HBr leads to an alkyl bromide, addin C6H13Br. On treatment of this alkyl bromide with KOH in methanol, form a elimination of HBr occurs and a hydrocarbon that is isomeric with the ber starting alkene is formed. What is the structure of this hydrocarbon, -mote and how do you think it is formed from the alkyl bromide? qedo eidt al .equory Janoitonut Tojem ent to noitqirozeb aus s eaupaib Il'ow aquo Ismoitonul red in related

題目跟解答在講什麼😅

7-65 tert-Butyl esters [RCO₂C(CH3)3] are converted into carboxylic acids (RCO₂H) by reaction with trifluoroacetic acid, a reaction useful in pro- tein synthesis (Section 26-7). Assign E,Z designation to the double bonds of both reactant and product in the following scheme, and explain why there is an apparent change in double-bond stereochemistry: H C-OCH3 C-OCH3 CF3CO2H C=C + H2C=C(CH3)2 H3C C-OC(CH3)3 C-OH 0- H3C

請問58（1） 為什麼不用考慮B的濃度級數呢？ 單純是因為無法看出來嗎？ 謝謝🥹

58. At el 10 g →CE) 2.96 0.0050 0.010 0.020 temperature, reactant A reacts according to the chemical equation: sk= A(g) +B(2) ► At 500 °C, the rate of the reaction increases with concentration of A as follows: =310 [A](M) Rate(M/s) = 152 1.2x10-2 (1) Determine the order of the reaction and write the rate expression. R=k [A] (2) Calculate the rate constant, and give its units k= = 1,24 104 (5!M² (3) Calculate the rate for a 0.0020 M concentration of A. R = 1,27104 台大) vust Rk) (1) R = K[A] ; (2) k = 12000M-s-+; (3) R =9.6x10-M/s -9.6x10.5 ($3$ (= s ON SX102 1.5x10-3 9.6x10-2 12x10 (0.01) R = 1,28104 (0.002 y 1014 +B) ( M) -2 -1 =

?在講啥⋯

| 2:47 Is tert-butoxide anion a strong enough base to react significantly with water? In other words, can a solution of potassium tert-butoxide be prepared in water? The pK, of tert-butyl alcohol is approximately 18. CH3 K+ 0-C-CH3 Potassium tert-butoxide CH3 2.47 CH3 H3C-Ç-O K+ + H2O CH3 -- CH₃ H3C-¢-OH + K+ OH CH3 pka 18 weaker acid H3c-9-OH pKa = 15.7 = stronger acid