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English Senior High

36,37,38の答えが分かりません。 どなたか教えていただけませんか?

asked strange questions so that the answers would sound funny and make them smile. that answer was true or not. Later in the interview, the volunteers were deliberately In the study, the scientists conducted interviews with volunteers. The volunteers recent study by scientists at the University of Portsmouth has shown that people can When people communicate face to face, they do not just communicate by speaking language. There are other factors involved, such as gestures. If the person you are tell if a speaker is smiling or not even without seeing their face but just by listening were asked to answer all questions with “I do in the summer,” regardless of whether talking to frowns, you know that he or she is unhappy. Whena person laughs during a conversation, you can tell that that person thought something was funny. However, a The interviews were videotaped with the purpose of gathering samples of different C 35) Smiling from Ear to Ear to their voice. of smiles. The scientists then analyzed the smiles. types According to the scientists, there are as many as 50 different kinds of smiles. T he researchers then had different group of volunteers listen to the audio portion of the recordings. This group of volunteers could tell what kind of smile the speaker had on his or her face by just hearing their voice. This indicated to the scientists that the voice has characteristics that communicate feelings and that people can interpret them. Another study also suggests that customer satisfaction is closely related to friendliness. As we all know, the best way to show friendliness is to smile. Researchers think that using the smiling voices in products or services effectively, Such as answering systems and computer programs, can contribute to better customer service. This can also be applied to hiring and training staff. Since people can tell ifa smile is real or not by a person's facial expression, and it has been proven that people, for example, customers can tell if a staff member's smile is real or not just by listening, then smiling not only from the bottom of your heart, but with your voice may be a g0od way to improve business.

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Chemistry Senior High

最後の質問で硫酸を用いる理由があまり理解してません。教えて欲しいです

Ho 1 過酸化水素は, 反応する相手の物質によって酸化剤にも還元剤にもなりうることが知 られている。 たとえば,過酸化水素は硫酸酸性水溶液中で過マンガン酸カリウムと反応するが,こ のとき過酸化水素は え剤としてはたらき) ①式のように酸素を発生する。 2e HO2 02 +2Hン 一方,過マン分ン酸イオンは[酸花剤としてはたらき, マンガンの酸化数は, ② 式 2T Hala → Mi 11 -3 に示すように から+Ⅱ(42)に変化する。 十2. MuOg + 8H+ +/50 → Mn?+ + 4H,0 また,過酸化水素は酸性水溶液中でヨウ化カリウムと反応するが, このとき過酸化水 素は3式のようば確化剤としてはたらき,ヨウ化物イオンは④式のように 正れ 剤としてはたらく。 HHO2 + 12H' + 2e- T0円。 * 2e- GI 2I- 9 12 内のア~オに適当な語句または酸化数を記せ。 内のA~G に適当な化学式あるいは電子(e-) を, 係数を含めて記せ。 (3) 市販の過酸化水素水を正確に 20倍にうすめ, その10.0mLを三角フラスコにとり, 希硫酸と蒸留水を加えた。この溶液に, よく振り混ぜながら 0.0200 mol/L の過マン ガン酸カリウム水溶液を少しずっ加えたところ, 14.00 mLで酸化還元反応が終了した。 この結果より,市販の過酸化水素水中の過酸化水素のモル濃度(m9f/L] を有効数字3 桁で求めよ。 (4) (3)の実験で, 過マンガン酸カリウム水溶液を酸性にするのに, 塩酸や硝酸ではなく 硫酸を用いる理由を説明せよ。 (/40/mol/L HU:0-の最) 4にint.Hmのかといし (にるので、片娩のみとし | -6の残酸だから HN03: Wんらし説のよい。 MnOr t SHt + Se Mil + 4H.0 H.0。 → 12 2H" 12e

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