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化学 高校生

波線部の「塩化ナトリウムのように分子とよべるユニットが見当たらないような物質」とはどういうことでしょうか。

STAGE 3分子量と式量 の別冊 p.5~7 o 物質の元素構成を元素記号で表したものを化学式といいます。 原子が特定の chemical forimula みんし ぶんし 比率で結合してできた複合的な粒子を分子といい, 分子を表した化学式を分子 molecule molecular formula しき 式といいます。 例えば、水という物質を構成している基本粒子は, 水素原子2つと酸素原子 1つが集まってできた水分子で,分子式では H.O と表します。 『H.O』と書く 拡大 1は省略 また,ダイヤモンドのような超巨大分子や,塩化大トリウムのように分子と よべるユニットが見当たらないような物質を化学式で表す場合は, 一般に元素 の組成を最も簡単な整数比で表します。 これは組成式とよばれています。 そ せいしき Compositional formula ダイヤモンドは炭素1つ, 塩化ナトリウムはナトリウムと塩素1つずつで, 最も簡単な物質の組成単位なので, 次のように表します。 拡大 『C』と書く ダイヤモンド 拡大 『NaCl』と書く 塩化ナトリウム の結晶 原子量の値を用いて, 分子1個の相対質量や組成式1単位分の相対質量を表 したものを化学式量といい, 前者を分子量, 後者を式量といいます。 ぶん しりょう しきりょう molecular weight formula weight chemical formula weight 03 物質量 21

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英語 高校生

答え合っているか確認よろしくお願いします🙇‍♂️

●次の英文を読んで,設問に答えなさい。 Back in the 1960s/futurists predicted that the biggest problem/for Americans/in the year 2000/ would, be managing /all their free time. What happened? People in the U.S. /have all the timesaviig tools/they could want: jet travel,cell phones,microwave ovens/personal computers/and faxes. Yet/they work more,/not less, Unstructured time a day just to spend time with is hard to find:Obviously, (1) the futurists' idea was the opposite. In reality/ friendsor family the. Pore technology a society has, the less free time it has. Americans ín most cities feel/that time is scarce,that there is never enough of it. According to a social psychologist/ Robert Levine/we are experiencing (2) “a time famine." We are hungry/for time. People use/ their cell phones to stay/in touch with work when they are shopping for dinner or at the beach on the weekend. They have computersand fax machines at home so that they can be productive át any time of day or night. Everyone has 24 hours a day, of コ-ス (3) What Americans say they do not have is time to spendwith people/who are important to Course. 強,壁す them. In a recent survey, nearly three-quarters of the respondents said they needed more time oin3 with family and friends/and less stress, in order to feel satisfied.e A recent Harris 'poll*/showed' that American leisure time decreased almost 40 percent, within the past 20 years/but (4) that is only half the story. During that time, Americans' consumption increased/by 45 percent. When people buy more/they have to work more so they can pay/for the things they buy. (5One question on the poll askedif people agreed with the comment,/“Most of us Eighty-two percent/6f the respondents said yes. buy and/consume far more than)we need." るかに多い、 There is (6)good news. Many people in the United States/are trying to take back their time. Some people are choosing to have fewer possessions/and work less. Some people are changing priorities and making time for family and friends. Others are turning off their cell phones and taking time for leisure activities/ walking alonga beach at sunset, hiking up a hill to see the sunrise, taking a child/to the park/for the afternoon. Americans are discovering/that they want these things back/and they are the kinds of things/that only time can buy.

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英語 高校生

3段落目の最初の文の while はどのように訳すのか教えていただきたいです🙇‍♂️

Ago/77 7/877S 7 ea The humar an brain_is onc ol the most 芝 Sterlous 天 in the body/ In recent years、 206 iore aW OiU/One aspect they have been 也 thoush、 scicntists havc been lecarning more TesearchcrS. used to think studyins is the oN ol brains (oO change OoVer time/hn the past、 that onhy childrd EQ brains could chanse casily、 but,recent resegii Gugpests lthat tadult DTe 8 brainS are more Hiexiblc than orisginally thoushU/One study has shown that learning to 7さ recad can have a Su DFisine etlecton adult_brains. 277 の セアカネ The imtemdi60 team ot ScicntSts who carried_out the study wanted to see if learnins somethins like readins could Eeet the physical structure_ of an adult brain/They chose 30 adults in India kyholhad never learned to read or write./ Twenty-Qne of these adults were tausht to read for six months、 while the other nine Were not tausht/ The hnd) after they scicntists Scanned the .brains of all the 間 betore they began gnd wt 2MG 3? がかさリ2 4 7 finished. か (% ^ の (While the 21 participants learned to ra 9 gtted。 the scientists Were Surpriscd by 65Eina/itee showed 人 ha 0 Ad not only im the OR part of 確Kbut also in the p 9も inside. the brain一the part that adults use to learn neW brain control the body's physical movementS hnd also sort the These deep areas of the | information that comes in through the SenSeS Based on where the changcs occurred.the n a way hatuhelped theil scientists believe lthatthe participants brains began to Work EATmathOn_ 10JD6SSSO計計

解決済み 回答数: 1