想請教計算方法，目前求得莫爾比但後續處以0.18（化整數）時感覺很怪，題目要求120克pan的經驗式，但我化完整數後光是C+H前兩項的質量就會超過120克了，想請教各位如何計算

C z Hz N O S o f 3.44 Peroxyacylnitrate (PAN) is one of the components of smog. It is a compound of C, H, N, and O. Deter- mine the percent composition of oxygen and the empirical formula from the following percent composition by mass: 19.8 percent C, 2.50 percent H, 11.6 percent N. What is its molecular formula, given that its molar mass is about 120 g?

看不懂老師的算式 有人能幫我拆解步驟解釋一下嗎 或是另外寫易懂的算式過程 拜偷

A sample containing 25.14g of neutral salts, glucose and a sodium carbonate/bicarbonate buffer was dissolved in 100 ml of water. A 25 ml aliquot of the resultant solution required 20.35 ml of 0.0987 M HCl when titrated to the PP end-point. A second 25 ml aliquot was titrated to the MO end-point and required 56.75 ml of the acid. Calculate the percentage of Na2CO3 (molecular weight 106) and NaHCO3 (molecular weight 84) in the sample. 含有25.14克中性鹽、葡萄糖和碳酸鈉/碳酸氫鈉的樣品將緩衝液溶解在100ml水中。需要25毫升等份所得溶液滴定至PP終點 時,使用20.35ml 0.0987 M HCl。第二份25毫升等分樣本是滴定至MO終點,需要56.75ml酸。計算百分比樣品中的Na2C03 (分子量106)和NaHCO3(分子量84) 39

想請問這題的醚和胺的沸點可以如何排序？ 因為我印象中氫鍵的影響比極性大，因此不了解為什麼胺的沸點比醚小 謝謝🙏

56. List the following compounds from highest boiling to lowest boiling: NH₂ 分子量 - * b₁p= HB dipole 為何 ↓ relatively weak HB OH ⑥ dipole-dipole interactions Q= LOH has two groups that hydrop bund ~HNY WH HB的影響力不是通常大於極性嗎? OH Obme electronegative thun N, OH Ingen bond are stomper than NH₂ primary amines form stronger hydrogen bond than seculary relatively weak no bydrogen had hydrogen bonds HB→分子量(分散戶 nly dipic dipole →接觸面積→極性 hah no hydrogen bon weaker dipole-dipole interactions tha oxygen-containing compounds because N is low electro negative than O

不太懂要怎麼算

1 軌域中,電子的「自旋角動量」與「軌域角動量」的交互作用,會使軌域的能階 產生細微分裂,這作用稱為自旋軌域交互作用(spin-orbit interaction)。 在精密的儀器下可發現鈉燈,589.0nm與589.6nm 兩條譜線是鈉原子3p激發態之 電子躍遷回基態放出的光子所產生的。回答下列問題:三千岁位于民 (I)為何 3p 激發態的電子躍遷回基態會放出兩條譜線?畫出能階圖並簡述其理由。(8 分) (2)這兩條譜線的能量相差多少eV?(leV=1.60x107°J,h=6.63x104Js,c=3.00x 10°ms';8分) h=663×10-31 (A) 13.6 (B) 5.60 (C) 0.24 (D) 0.036 (E)0.0021。

有人會這題的嗎？

(12 points) Find the possible term symbols for the following electronic configurations (spin-orbit interaction is not necessary included) (a) (1s)¹(2p)¹ (b) (1s)²(2p)¹'(3p)¹ (c) (1s)²(2s)² (2p) (3s)² (3p)³

可以幫我想一篇題目為Recreation center 的英文作文嗎？（6/6 12:00以前要）

有人知道這篇的答案嗎？ The World of Board Games Board games have been a source of entertainment and social interaction for centuries. From ancie... 繼續閱讀

想知道答案D的更詳細解釋🙏

75. 11 (Nej 25 Na²O² is less stable than [Na₂ ] 0². This lesser stability is due to (A)the very small size of the Na²+ ion (B)the large size of the O²- ion relative to Na²+ (C) the instability of oxide ions in the presence of 2+ ions W (D)more energy is required to ionize sodium than would be realized in the attraction between Na²+ and 0²- (Ethe statement is false, both materials are stable. 【87 成大】

想問練習題3-1🙏🙏🙏 答案C 2 H 5

「解答」碳原子重(W)=13.2× 氫原子重(W)=3.6X- C:H:O 原子個數比= 12.0 2.0 18.0 氧原子重(W)=8.8-3.6-0.40=4.8(克) 3.6 0.40 4.8 12.0 1.0 16.0 44.0 12 -=3.6(克) =0.40(克) : : 練習題 3-1 18:179 7:17. 化合物甲為一種碳氫化合物,經實驗分析可知其中碳質量約占82.8%,求此化合 物的實驗式。 甲CxHy 173 X 1 =3:4:3,故實驗式為CH.O。 :69.172 = = 2:5 (zHs. 3-1.2 分子式 分子式( molecular formula)是用來表示純物質中,一分子內所包 含之原子種類和數目的化學式,例如:氮氣(N)、氯化氢(HCl) 乙烯(CH)、葡萄糖(CH2O)等。欲求出物質的分子式,一般會 先求出實驗式,再測出此物質的分子量,利用分子量為實驗式式量的 整數倍,即可求出分子式,如式3-1、式 3-2 所示。

題目看不懂問什麼及請問答案

2. Draw an alkane with the molecular formula C5H₁0 for each of the following criteria: (a) could exist in either cis or trans isomers, (b) could not exist in either cis or trans isomers (c) contains only secondary carbons.