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自然 國中

求解🫠謝謝❤️

子題 答 市面上很夯的漸層飲料,是由藍色蝶豆花原汁(内含花青素)搭配其他溶液 調配而成。蝶豆花原汁的 pH 值約為 6.5,接觸不同 pH 值液體時會呈現不同 的顏色,如圖(三十六)所示。 pH值 0 紫紫 色色 圖(三十六) 調配漸層飲料需考慮不同溶液間的密度差異及互溶性,以下實驗是為了 研究漸層飲料的製造過程,實驗中還會使用檸檬汁與果糖糖漿,其pH值依序 是2.2與7。 實驗:進行漸層溶液的調配。 幹 先取20 mL的果糖糖漿加入試管中,再取20 mL的檸檬汁緩慢加入同一個試管 中,最後在試管中,緩慢加入蝶豆花原汁20 mL。依序加入溶液的過程中,需 盡量避免擾動已加入的溶液層。從溶液倒入後開始觀察並記錄試管內的變化。 實驗結果: 1. 實驗初期,蝶豆花原汁會漸漸滲入檸檬汁層,而使溶液產生漸層、果糖糖 漿層保持原狀。 蝶豆花原汁 檸檬汁層 果糖糖漿層- 2. 靜置數分鐘後,因蝶豆花原汁與檸檬汁兩者密度不同,且彼此可互溶,最 後會混合成一層,如圖(三十七)所示。 實驗初期 9 10 11 12 13 14 案A 果糖糖漿層 靜置數分鐘後 蝶豆花原汁與 「檸檬汁混合層 -果糖糖漿層 圖(三十七) 參考文中資訊,若將蝶豆花原汁和果糖糖漿,分別都加入適量的水稀釋,關於 兩杯溶液稀釋前後氫離子濃度的變化,依序應為下列何者? (A)變小、不變 (B)變小、變大 (C)變大、變大 (D)不變、變大

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自然 國中

求4.5.7解 謝謝!!

3.小妹喝著加了冰塊的檸檬紅茶,她發覺愈喝愈不甜,這是什麼原因造成的? (A)因為喝掉紅茶中的糖, 使紅茶中糖水的濃度降低 (B)溫度升高,溶解度下降,紅茶中糖水的濃度降低 (C)因為冰熔化成水, 所以紅茶中糖水的濃度降低 (D)因為冰熔化,糖就被析出,所以紅茶中糖水的濃度降低 14.市面上醫用雙氧水,是重量百分率濃度為5%的過氧化氫(HO2)水溶液。若雙氧水質量是 200 公克, (D) 30:170 ※其中含有若干公克過氧化氫?若干公克水? (A)3;197 (B)10;190 (C)9;191 05.有一上皿天平,其兩邊秤盤因鏽蝕而不等重,今將一物體置於左盤,則右盤需加6公克砝碼才能平衡, 若將物體改置右盤,則左盤需加3公克砝碼才能平衡,由此可推知下列何者正確?(A)右秤盤質量比左 A K秤盤質量輕 1.5 公克 (B)右秤盤質量比左秤盤質量輕 3 公克 (C)右秤盤質量比左秤盤質量重 1.5 公克 (D)右秤盤質量比左秤盤質量重3公克 6.小南在燒杯中裝有定量的水,下列哪些方法可溶解更多的硝酸鉀? (A)加速攪拌 (B)增加水的溫度 (C)將硝酸鉀磨細 (D)增加壓力 7.已知室溫時,食鹽的溶解度為36 g/100g水,小妃在室溫下分別配製甲、乙兩杯食鹽水溶液,各杯內加 入的食鹽與水之質量如附表所示。小妃將兩杯食鹽水溶液過濾後混合成一杯,若過程中水的蒸發量不計, 此杯混合溶液的重量百分率濃度約為多少? (A)26.5% (B)30.0%(C)36.0% (D)42.9% |燒杯食鹽(g) 水(g) 24+36 甲 24 60 乙 36 80 8.小平利用排水法測量一個塑膠球的體積,在過程中她發現塑膠球會浮在水面上,所以將實驗步驟做了一 030 84+116. 200100 C (41) F

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英文 國中

幫我解答全部題目答案,因為我全部都不會

V 31 3 @Z/9 op www 1/9 ELOZOF 11 mp 1 What day 49 421-1 What time at 007 114 115 there are 17 ANDA 3x6 m ²²m 18 19 10210118 84 237 英語科 第2 次複習考 第2單元 8114~6 ·單題,請依文意選出一個正確或最佳的答案。 (每週3分,共453) (D) 1. What day does the boy have science class? A) On Wednesday. On Thursday, (C) On Tuesday. (D) On Friday. (A) hurry () 3 lan: Do you have the Amy: It's ten to ten, A second (B) date (C) minute Di time () 4 When Nancy studied in the USA, she lived house two American girls. A in; of (Cof, with () 5 On Chirldren's day, tickets to the zoo is (A) free (B) famous stays (A) somewhere () 2 My parents will come home late today, so they ask me to the dog after school, (1) go (C) walk ? (B) at; with (D) in; with (A) doesn't have (C) has () 13 Listen! A baby (A) cry (C) is crying () 14 I have to get up early, (A) and () 15 Ruby Sun Let's go check. (D) run (D) strong (C) quiet () 6 The man went to the hospital right after a nose. (B) kiss (A) blow () 7. Lily likes to listen to (C) cry when she is sad. (C) music (A) card (B) movie (D) spell & You are all wet. Go take a bath and make the water as hot as you can or you will catch a cold. (A) fight (B) bear (D) put (C) look () 9. Hang up the phone, please. David won't get lost. He just to cool off. (B) cries (D) cried a Sat to his (D) band (B) here (D) now (C) later ( ) 10 Did you see my black dress? I put it (A) between (B) on (D) over (C) at () 11. Fans up to see their favorite singer in front of the department store. (A) meet (C) hide (D) shake (B) line any cloud in the sky. It will be a lovely day. () 12 There (B) isn't (D) don't have 11 AT A MAR 304 the bed. I will miss the school bus. (C) when (B) or (D) until the dishes now, but she has to take out the trash later. (A) does (B) do (C) is doing (D) did 二、題組:請依所附的短文或圖表,選出一個最適當的答案。 (16~20題每題2分,1~5題每題3分,共55分) (16~20) Zoe: Hi, that's a cool bag. Alice: Thanks. Are you a fan of Red Bear? Zoe: Yes, 16 my favorite band. By the way, my name is Zoe. Nice to meet you. M B23 M Alice: Nice to meet you, too. I am Alice. A-L-J-C-E Zoe: I didn't see you before. Are you new here? Alice: Yes, it's 17 first day at school. Zoe: 18 are you from? Alice: I am from France, like my father. Zoe: Cool, Oh, the bell 19 19 What class are you in? Alice: I am in Class 801 Zoe: Me, too. We are classmates. There 20 a big tree in front of our classroom. Let me show you around. () 16 (A) there is (C) it is ( ) 17 (Wa (C) my ) 18 A) When (C) Who (19 (A ring (C) rings () 20 N have (C) are (21-22) (1) it has (D he is (D) me (1) Where (C) 《背面有試題 2-1》 (Di What (B) is ringing Alaska Boat Trip Guide This guide will help you know more about animals in or near the sea. You can see it during your trip. () 22 Which is true? (D) rang (B) bas (Dis Puffins live on the sea, and they are good at swimming. They have black, white and grey body. Their beaks are black and orange. They look cute, so they are very popular. In May, they come here to build. their nests. You can see them flying over the sea with some fish in their beaks. www. Killer whales are black and white They are not whales. In fact, they are in the dolphin family. We usually see them swim in a group and we call it pod. A good time to see those animals is from June to September. guide thi whale dolphin beak nest () 21. Which picture shows pod? (A) 2 (B) (DI (A) Puffins have black and white beaks. (B) The best time to see killer whales is in early spring. (C) Both animals can live both on land and in the sea. (D) Both animals are black and white.

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