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化学 高校生

高校1年 化学基礎 の問題です。 教科書を調べてもよく分かりません。 答え、解き方をわかるところだけでも良いので教えてください。

化学基礎確認テスト 19 1. 次の文中の ( に適当な語句, 数値を答えよ。 原子1個の質量は極めて小さいので、扱いにくい。 そこで、 ある原子の質量を基準としてそれと比較し た (ア) が用いられる。 原子の (ア) の基準は, 「質量数 (イ)の(ウ) 原子1個の質量を (エ) とする」 と定められている。 自然界に存在する多くの元素には, (ア) が異なる (=質量数が異なる) いくつかの (オ) が存在し, それらが一定の割合 (存在比)で混合している。 そこで, 各元素を構成する (オ) の (ア) とその存在比 から求めた平均値を、その元素の (カ) という。 x (ア) 相対質量 (カ) (株)同位体 原子量 x 11 a a 2.12C原子1個の質量は1.99×10-23g, また,ある原子 X 1個の質量は4.48 × 10~23g である。 Xの相対質量 を有効数字3桁で求めよ。 0.214 0.44. 69 日 (イ) 188 19880 17 9 2 3. 天然のホウ素は, 質量数 10 の同位体 (相対質量 10.0) が 19.9% と質量数11の同位体 (相対質量 11.0) が 80.1%が混在している。 ホウ素と原子量を求めよ。 3410:19.9=11:80.1 3.4% 228=801 40.96 (ウ) 439.1 4096 228) 01 8 uni PROPUS WINDOW 4,480 1702 (エ) 228,0 4. カリウムは, 原子量が39.10であり, 3K (相対質量38.96) と 41K (相対質量40.96 ) の二つの同位体が 258 自然界で大部分を占めている。 これら以外の同位体は無視できるものとしたとき, "K の存在比は何% か。 有効数字2桁で答えよ。 こ 39.10=38 39.1 38.96 = x 40.96 x38.06 %

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英語 高校生

ELEMENT2 lesson5 の問題です! 至急今日の朝7時までにお願いします🙇‍♀️🙇‍♀️

5 6 2. We should Comprehension A Reading for main ideas : Choose the best answer. 1. What is the main idea of the passage? @ The future of space travel. b The environmental problems in space. The technology to send a satellite into space. 2 3 B Reading for details : Fill in the blanks with the words in the box below. There are some unnecessary words. Then divide the paragraphs into the following sections. ). The junkyard a stop sending satellites into space b burn all the debris in space O not increase the amount of space debris to change the situation. The largest junkyard in the solar system is around the (1. (2. ) to 20,000 miles overhead. Most space junk (3. ) from manmade satellites and rockets. It would (4. about 11 million pounds in total. Space junk can cause a lot of (5. shuttle window was made by a piece of (6. The scientists work together to keep (7. might hit space shuttles and satellites. The scientists must try to find where the junk is and the (8. going, but it is not simple. Paragraph Organization Introduction ( Body ( Conclusion ( ). For example, a small crack in the space ) of the largest pieces because they Without careful (9. ), the space junk problem will get worse. Also, we should try to (10. ) adding more. World (11. ) is necessary to reduce the risk of space junk. ) ) ) ) the pieces are HAAR MELAY Words stretches / weigh/junk/track / watching cooperation / damage / direction / travels satellites / Earth / trouble / comes / stop

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英語 高校生

ある塾の英語の長文テストなんですけど、問一の答えが順番に、3.2.4と書いてるんですが全く納得いきません。Part1が4でなく、3なのはまあ百歩譲れますが、Part3が4になる意味が分かりません。風力発電の環境面での利点なんて一文字も書いてない気がします 問題の作成ミスでし... 続きを読む

You are preparing for a speech about alternative energy forms. You have found a journal article about wind energy. You are going to read the article and take notes. Wind Energy [Part 1] Scientists are always looking for more sustainable and cost-effective forms of energy, and many people believe wind energy is the best option available. Wind is a product of heat from the sun, so the energy supply will never run out. Wind does not pollute the air, water, or ground as it produces energy. Another major benefit of wind energy is that it requires no water. In contrast, traditional forms of energy production all require water for cooling. Due to its efficiency, scientists have worked to increase the capacity of wind production units. They hope to develop wind energy into a large-scale alternative to fossil fuels. [Part 2] Wind energy can be produced using offshore wind or land-based wind. The primary benefit of offshore wind collection is that it is more efficient because offshore wind blows more consistently and with more power than land-based wind. To take advantage of the steadier wind, offshore wind production units are bigger and have more capacity. Therefore, the energy acquired from offshore wind can produce significantly more electricity than land-based wind energy. Wind production units located in the sea off the coasts of big cities can efficiently provide energy to many people, while land-based wind production units take up valuable land space and require complicated transportation efforts. However, since it is a newer technology, offshore wind energy is currently more expensive than land-based wind energy. [Part 3] Even though it actually has ancient roots, producing energy from wind is usually thought of as a modern alternative to burning fossil fuels. Initially, wind energy provided power for electricity. But during the mid-20th century, it was replaced by fossil fuel resources. Unfortunately, the pollution created from the burning of fossil fuels is a major cause of global warming. This has forced scientists to develop more sustainable and cost-effective forms of wind energy. Currently, most offshore wind resources are located in coastal waters which are too deep for current wind energy technology. However, engineers are working to develop floating production units that can withstand the hard environment of the ocean, such as storm waves, hurricane-force winds, and ice flows. These developments offer wind as an effective source of energy without damaging the environment. Complete the notes by filling in 1 to Outline: Part 1: 8 Notes

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英語 高校生

教えてください!!

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解決済み 回答数: 1