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英語 高校生

§18-1の下線部のorは何と何を並立してますか? §18-2(2)の,andのandは何と何を並立してますか? 教えてください。

共通関係一何と何が並んでいるの? 以下の英文を読み, 下線部を和訳しなさい。b indeed when my friend Peggy Hughes first suggested to me that d yno ai. bptnsg 0 b In the last decades of the eighteenth century, and in the first half of the nineteenth century, a number of words, which are now of capital importance, came for the first time into Common English use, or where they had already been generally There is in facta general pattern of change in these words, and it is possible to look at the wider changes in life and thought to 5 used in the language, acquired new and important meanings. thought at first of making these letters and notes into a book, and Icould and should do so, the idea seemed impossible and absurd. 42 o benti S 18 9on9brgg 1916W no) ny re G 5 O990 G200L0B tcione which the changes in language evidently refer. The destruction of (法政大) m s dependence on the m In 1960, when I first began writing notes about Lisa, I did 2 not think of myself as collecting data, or doing research, or getting ready to write a book. I was a charmed and delighted adult with(like Mrs. Bissex)“an inclination toward writing 5 things down," in the form of letters to friends or notes to mysell, of which I sometimes later sent copies to friends,/ (2 au thought at first of making these letters and notes into a boOK, e declo ard people who are diferst (協大) as and ies y mutual tudenstanding

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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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