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化学 高校生

【英語ですみません】最後の12番は何を書いたら良いのでしょうか…? Video C の実験では、aqueous solution にlead(ii) nitrate, aqueous solution にPottasium iodide を入れていました。 2KI (aq)... 続きを読む

With lead (I) nitrate solution. This precipitation reaction produces a bright yellow solid. (point values in parentheses) Part 1: 1. Copy the unbalanced reaction below into your lab notebook. Balance the reaction by adding coefficients. (1) KI (aq) Pb(NO,), (aq) KNO, (aq) Pbl, (s) 2. a) Which trial are you assigned? b) Copy the data table below into your notebook. Watch video A (make sure it's the correct trial!) and collect your data. You may need to pause or rewatch the video, it goes quickly. (1.5) Mass of Empty Beaker (g) Mass of Beaker+ solid Pb(NO,)。(g) Volume of 1.0 M KI (aq) (mL) For the following calculations, show all your work for full credit. 3. What mass of solid Pb(N0,), was added to the beaker? (1) 4. If the solid Pb(NO,), was dissolved in 45 mL of water, what is the molarity of the Pb(NO,)。 solution? (2.5) 5. Which compound is the limiting reactant? (4) 6. What mass of lead (II) iodide (PbL,) should be produced? (2) Part 2: 7. Watch video B (make sure it's the correct trial!) to see the complete reaction and collection of the product. Copy the data table below and record your data. (1) Mass of filter paper (g) Mass of filter paper + dried precipitate (g) 8. What mass of precipitate was collected? Show your work. (1) Calculate the percent yield for the reaction. Show your work. (2) 10. For your trial, which three ions were present in the filtered solution at the end of the reaction? In other words, which three ions are still dissolved at the end of the reaction? Defend/explain your 9. answer. (3) 11. Watch video C - watch both tests for your trial and record your observations. (1) a) Add lead (II) nitrate - b) Add potassium iodide - 12. These tests were conducted to prove the identity of the limiting reactant. Considering your answers to the previous two questions, describe how these tests support the prediction you made in question 5 about which compound is the limiting reactant. (2)

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英語 高校生

この答えを教えてください! 問題が多くてすいません。 よろしくお願いします!

英文を読み,下の設問に答えなさい。 When many people hear “Chanel," they think of luxury, but Chanel's/childhood was not luxurious at all. Chanel's mother died when she was 12 years old. After that, her father took her to a Catholic orphanage and (Dleft her there. Chanel never saw her father again. In those days, sewing was more important for girls than studying, so the nuns taught the girls in the orphanage ( ) sew. Chanel got better very quickly. One day, she changed her uniform and made のit prettier. ③She was careful not to break the rules. Everyone loved her designs. She realized she had a talent for fashion design. After Chanelleft the orphanage at age 17, she took every chance that she could get. When Chanel became a famous fashion designer, she said, “My life didn't please me, so I created my life.” Ifyou are unhappy with your life, remember her words. If you try, you can change your life! 1) 下線部のと同じ文法と意味で使われている left をひとつ選び, 記号で答えなさい。 イ She left her umbrella in the train. (2点) ア Aletter was left on the table. エ I left his house at eight. ウ I have a pain on my lef hand. )の中に入る語句として適したものを下から選び, 記号で答えなさい。 オ which to (2点) ウ how to where to エ ア what to イ when to (2点) 3) 下線部2の itが表す語を本文中から2語で抜き出しなさい。 (3点) 4) 下線部3を日本語にしなさい。 5) 本文の内容に合うように,( )に適切な語を書きなさい。 (完答2点×3=6点) i) In those days, ( )is less important for girls than ( ii) Chanel's designs were( )by everyone. )created ( ) life. i) Chanel's life didn't pleased her, so (

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英語 中学生

分からないので教えて下さい!!!

次の問いの答えとして最も適当なものを、①~①のうちから1つ選べ。 Why couldn't Mr. Black and the children go for a swim one day ? 1 Because they had to go to the lake and look into the water. Because Mr. Black couldn't swim well 読解 問1 読解 3 Jill, Ellen, Bob, and Edward lived near a lake. They could go for a swim every day. A man named Mr. Black lived near the lake, too, Sometimes Mr. Black went Because the lake got dirty with garbage, oil and tires. 3 Because they could not get a boat. One day they asked him to go for a swim with them. Mr. Black said, “We can't o a swim. We may never swwim in the lake again. “Why not ?" asked Edward. swimming with the children. 下線部(ア)について,何をするために彼らは出かけたのか,日本語で答えなさい。 問2 「Because the lake is polluted." said Mr. Black. “There's a new Sign at the lake. h says: No Swimming, Polluted." “What is polluting the lake ?" asked Jill. 明3 下線部(イ) peopleが指すものとして、本文中に書かれていないものを、次の0~ ののうちから1つ選べ。 タイヤを捨てた車の所有者 “Let's go down to the lake and look at it." said Mr. Black. (ア) Mr. Black and the children went to the lake on a sunny Sunday. They looked into the water. It wasn't clean. They walked around the lake and they saw why it wasn't の 2 汚水を流した工場の人々 O 湖の近くに住む人々 clean. 3 油を流したボートの所有者 “Look at that *garbage in the water,” said Jill. “That's what's polluting the lake,” Edward saw oil floating on the water. “That oil pollutes the water, too,” said Edward. “It comes from boats on the lake." 下線部(ウ)について, 人々は何がわかっていたのか、 日本語で答えなさい。 問4 “Come here, " said Ellen. “Take a look at this. There are tires in the lake !" “Why would people throw tires into a lake ?" asked Bob. “They just don't stop to think," said Mr. Black. “But they are not the only ones who pollute the lake. The people who run that factory pollute the water, too." Bob looked at Mr. Black. ““What can we do ? How can we stop the pollution ?” he asked. “Well, we must get help from other people. We can't do it alone,” said Mr. Black. Mr. Black had a firiend who worked for a newspaper company. He asked him to help. The next day, the story about the pollution was reported in the newspaper. Many people read about the story. They talked of the pollution. They talked of ways to clean it up. One day ( People met at the lake. They came to clean it up. They cleaned out the garbage. Then they cleaned out the tires. They set up big cans. Then they put signs on the cans. The signs read, “Put Your Garbage Here.” People who lived near the lake came to help. People who had boats came to help. And, people from the factory also came to help. (ウ) They knew that it would take a long time to get the lake clean again. But they did not give up. They all hoped that someday the “No Swimming" sign would come down and the people could swim in the lake again. 注) garbage=ごみ

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英語 中学生

どうして No worries なんですか? No worry じゃダメなんですか?

Listening Point ) A-21 (解) (100ページ Listen to the story again and find the answer. 綾音は何を落としましたか? A Today's Story ) @ A-19 dhie Min-jun Excuse me! Oh, hi, Ayane. hi Aon Ayane Hello, Min-jun. I'm sorry, I didn't see you Min-jun No worries. Hey, you dropped something. Here there. you go. Ayane Thanks. Min-jun You like Dream Mode Magazine? Ayane Yeah. I want some ideas for new spring clothes. T'm going shopping with my aunt tomorrow. She's a fashion designer. Min-jun Nice! Actually, I just bought the same magazine. See? nooa loodba 出効キさ Aue Ayane Wow! More Words & Phrases No worries, (<worry) 気にしないで。 /心配しないで。 日本語訳 ミンジュン:すみません! あ、 やあ、 綾音。 綾音:あら、ミンジュン。 ごめんね。 そこにいること、 気づかなかった。 ミンジュン:気にしないで。 ねえ、 きみ何か落としたよ。はい、 どうぞ。 綾音:ありがとう。 ミンジュン:『ドリームモードマガジン』、 好きなの? 綾音:うん。新しい春の服のアイデアが欲しくて。 あした、 おばさんといっしょにショッピングに行く おばさんはファッションデザイナーなのよ。 ミンジュン:いいね! 実は、 ぼくもちょうど同じ雑誌を買ったんだ。ほらね? 綾音:わあ! 6E

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