(b)で下線部が分子量だとダメな理由って何ですか？ 鎌田の理論化学を読んでもあまり納得できませんでした

A カマタ P21 14. <化学の数量的な基礎用語》 次の記述のうちから,下線部の語が正しく使われているものを3つ選べ。 (a) 塩化ナトリウムの分子量は 58.5である。 (b) 銅の単体の式量は 63.5 である。 (c) 12C の原子量は12である。 (d) 水分子6.02×103個の物質量は1mol である。 [15 北里大改) (e) 空気のみかけのモル質量は 28.8g/mol である。

分子の形と極性を簡単に見分ける方法を教えて下さいお願いします

65 分子の形と極性 次の分子の形と極性の有無を, それぞれ下の語群から記号で選べ。 水素 フッ化水素 水 二酸化炭素 メタン アンモニア の A 3 A の A C 分子の形 12 6 ア の 極性の有無|2 分子の形(A. 直線形 極性(ア,極性分子 B. 折れ線形 C. 三角錐形 D. 正四面体形) イ.無極性分子)

空欄に、下のワードリストの単語を入れる問題なのですが、合っていますか？よろしくお願いいたします。

Using Key Words Correctly olnl paittea Write the missing words in the short essay below by choosing a word from the WORD LIST below. Use your glossary if necessary. THE IMPORTANCE OF TREES Trees are as important to humans as food and 1e, waTer. Trees clean the air of toxic chemicals such as carbon ? Ci dioxide and otherpollutants. They also produce about 30% of the oxygen on_carth The trees lining city streets can save up to 50% on air-conditioning なる in the summer and control 4. notse pollutioní. Forests hold soil in place and keep water from running off the land. Trees provide shelter, food, recreation, beauty, and homes for birds, insects, and other ani- mals. We use the 5 t Wo0d from trees in many ways, from paper to houses. We could not exist if there were no é d. Trees. Sadly, we are destroying them faster than they can grow. Rainforests, which are vital to the earth's health, are decreasing yearly. Many birds and animals have become 7extinct due to tree loss. Climate change has badly affected the trees which give us coffee and 8_0. Co coa beans. In Japan, about 60% of the 9k.land is mountain forests; however, Japan is one of the biggest importers of wood in the world. Seventy percent of Japan's building materials come from overseas. Eighty percent of Ja- pan's chopsticks are 10 Q. Imporled It is estimated that 20 percent of Japan's imported timber comes from illegally logged trees, mainly in Southeast 11 h. Asta. 6 We need to become more aware of the threat to the world's trees and use wood resources wisely. One good thing we can do is this: 12_f.plant a tree. WORD LIST ji earth k. land 痛入されま A. imiBorted b. noise C. dioxide g. cocoa d. trees K. Asia . plant e. water 1.extinct fwood 絶盛した HEALTHTALK LESSON 4

⑵と⑶が分かりません。

読解問題1 10 フェアトレード (Fairtrade)について述べた次の英文を読んで, あとの問いに答えなさい。 Have you ever heard the word “Fairtrade" ? I heard the word 1last week when I went to a coffee shop whose *owner is my father's friend. This is *what I learned about Fairtrade. Fairtrade is the "practice of paying *fairer *prices for *products that were made in 5 developing countries. It started in Europe in *the 1960s. At that time in many parts of the world, people who worked on farms had a big problem: they couldn't make enough money to live. There were other problems, too. Farm owners tried to make things like coffee quickly because they wanted to get more money. To *achieve this, they used more *chemicals than usual. Also, some of the workers on farms were children. The 10 children didn't get money from their owners, and many children couldn't go to school. Then Fairtrade started. Some people began to buy things at higher prices. People who joined Fairtrade got more money than people who didn't join it. The money *brought about some good changes. For example, farm owners stopped using a lot of chemicals and they began to give more money to the workers. Also, children *no longer 15 had to( ① ), and schools for children were built. Now, many people around the world are interested in Fairtrade. However, in Japan, there are few people who know about Fairtrade. It makes me really sad. If we don't choose Fairtrade coffee and buy other coffee, it will be cheaper, but if we choose Fairtrade coffee, 2) ]. I think each of us should learn about Fairtrade and start 20 doing something to help. 【注) owner:経営者 what S + V:Sが~すること practice:行為 fair:公正な price:価格 product:生産物 the 1960s:1960年代 achieve:達成する chemical:農薬 bring about ~:~をもたらす no longer ~:もはや~ない (1) フェアトレードが生まれた背景として適さないものを,次のア~ウから1つ選び,記号で答えな さい。 (3点) ア People wanted coffee that tasted better. イ A lot of chemicals were used. ウ Some children working on farms couldn't go to school. (2)(0 )に適するものを, 次のア~エから1つ選び, 記号で答えなさい。 (3点) イ change エ work ア study (3) [2に適する文を,次のア~ウから1つ選び, 記号で答えなさい。 ウ buy coffee (4点) ア we can get coffee that is more delicious than before イ farm workers can have more money than farm owners ウ it will help many workers and many children around the world 47

この問題教えてください。

読解問題1 10 フェアトレード (Fairtrade)について述べた次の英文を読んで, あとの問いに答えなさい。 Have you ever heard the word “Fairtrade" ? I heard the word 1last week when I went to a coffee shop whose *owner is my father's friend. This is *what I learned about Fairtrade. Fairtrade is the "practice of paying *fairer *prices for *products that were made in 5 developing countries. It started in Europe in *the 1960s. At that time in many parts of the world, people who worked on farms had a big problem: they couldn't make enough money to live. There were other problems, too. Farm owners tried to make things like coffee quickly because they wanted to get more money. To *achieve this, they used more *chemicals than usual. Also, some of the workers on farms were children. The 10 children didn't get money from their owners, and many children couldn't go to school. Then Fairtrade started. Some people began to buy things at higher prices. People who joined Fairtrade got more money than people who didn't join it. The money *brought about some good changes. For example, farm owners stopped using a lot of chemicals and they began to give more money to the workers. Also, children *no longer 15 had to( ① ), and schools for children were built. Now, many people around the world are interested in Fairtrade. However, in Japan, there are few people who know about Fairtrade. It makes me really sad. If we don't choose Fairtrade coffee and buy other coffee, it will be cheaper, but if we choose Fairtrade coffee, 2) ]. I think each of us should learn about Fairtrade and start 20 doing something to help. 【注) owner:経営者 what S + V:Sが~すること practice:行為 fair:公正な price:価格 product:生産物 the 1960s:1960年代 achieve:達成する chemical:農薬 bring about ~:~をもたらす no longer ~:もはや~ない (1) フェアトレードが生まれた背景として適さないものを,次のア~ウから1つ選び,記号で答えな さい。 (3点) ア People wanted coffee that tasted better. イ A lot of chemicals were used. ウ Some children working on farms couldn't go to school. (2)(0 )に適するものを, 次のア~エから1つ選び, 記号で答えなさい。 (3点) イ change エ work ア study (3) [2に適する文を,次のア~ウから1つ選び, 記号で答えなさい。 ウ buy coffee (4点) ア we can get coffee that is more delicious than before イ farm workers can have more money than farm owners ウ it will help many workers and many children around the world 47

この問題教えてください。

読解問題1 10 フェアトレード (Fairtrade)について述べた次の英文を読んで, あとの問いに答えなさい。 Have you ever heard the word “Fairtrade" ? I heard the word 1last week when I went to a coffee shop whose *owner is my father's friend. This is *what I learned about Fairtrade. Fairtrade is the "practice of paying *fairer *prices for *products that were made in 5 developing countries. It started in Europe in *the 1960s. At that time in many parts of the world, people who worked on farms had a big problem: they couldn't make enough money to live. There were other problems, too. Farm owners tried to make things like coffee quickly because they wanted to get more money. To *achieve this, they used more *chemicals than usual. Also, some of the workers on farms were children. The 10 children didn't get money from their owners, and many children couldn't go to school. Then Fairtrade started. Some people began to buy things at higher prices. People who joined Fairtrade got more money than people who didn't join it. The money *brought about some good changes. For example, farm owners stopped using a lot of chemicals and they began to give more money to the workers. Also, children *no longer 15 had to( ① ), and schools for children were built. Now, many people around the world are interested in Fairtrade. However, in Japan, there are few people who know about Fairtrade. It makes me really sad. If we don't choose Fairtrade coffee and buy other coffee, it will be cheaper, but if we choose Fairtrade coffee, 2) ]. I think each of us should learn about Fairtrade and start 20 doing something to help. 【注) owner:経営者 what S + V:Sが~すること practice:行為 fair:公正な price:価格 product:生産物 the 1960s:1960年代 achieve:達成する chemical:農薬 bring about ~:~をもたらす no longer ~:もはや~ない (1) フェアトレードが生まれた背景として適さないものを,次のア~ウから1つ選び,記号で答えな さい。 (3点) ア People wanted coffee that tasted better. イ A lot of chemicals were used. ウ Some children working on farms couldn't go to school. (2)(0 )に適するものを, 次のア~エから1つ選び, 記号で答えなさい。 (3点) イ change エ work ア study (3) [2に適する文を,次のア~ウから1つ選び, 記号で答えなさい。 ウ buy coffee (4点) ア we can get coffee that is more delicious than before イ farm workers can have more money than farm owners ウ it will help many workers and many children around the world 47

□2の一文目について have beenとありますが、なぜ現在完了形なんですか。

1 One day, thousands of years ago, some fishermen camped on a sandy beach T 砂へ next morning one of the men found a strange stone in the ashes* of the campfire. He boa never seen a stone like it before. Wondering what it was, he picked it up. When he turnoa it over in his hands, he saw the morning sunlight shining right through it. He was sur。 that it had not been on the beach the night before. Could the fire in some way have made 前日の見 5 どうにかして this strange material? 2 It is thought that this may have been theway people first discovered glass. You can make glass by mixing sand with certain chemicals in a very hot fire. Perhaps, by accident. all of these materials were mixed with the sand on that beach. dAl orT (6)

この解き方を教えていただきたいです。 何処から手をつければいいか分からない状態です。

How many moles of H,O, were used in this demonstration? The peroxide solution is 35% by volume, the density of H.O2 is 1.45g/mL. 2H.0。 溶液胎+H 溶質が35。 0 +ントにD 4。 C0149<0028 0015mcl t

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

ここの構文と意味のとり方教えて下さい🙇‍♀️

a safe chemical with(the lowest boiling point 6f)any gas, which fhakes helium good for cooling medical equipment o extremely 16w temperatures. Helium is also used(in combinations of breathing gases for deep-sea diving replacing nitrogen gas, which can hake people'sick at high pressures. Helium is collected as a by-product of the oil and gas industry. In the 1920s, the US government began to store helium at the National Helium Center (NHC), to_use in military flying machines. By the 1960s, the US military had new uses for helium, such as cleaning fuel tanks for rockets. By the 1990s, the NHC was in enormous debt from storing helium, so a law was passed in 1996 forcing the NHC to sell all of its helium by 等、 2A15 no matter the market price