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

【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)... Read More

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)

【問題英語ですみません】どの様に解くのでしょうか。授業中を休んでしまい、問題の意味が良くわからなくなってしまいました…どなたか説明お願いします😭🙇‍♂️🙇‍♂️ 問題文の中に~M (molarity) が二つ出て来るのですが、その二つをどの様にして使い解くのでしょうか…文... Read More

0c045L (L -01086 8. To what volume to you need to dilute 50.0 mL of a 2.00 M stock solution to get a 0.095x- X- D.91 95.2 mLy 0(095 |000 mL 9. How much deionized water do you need to add to 30. mL of 7.0M NaOH to make a solution that is 3.0 M? What total volume will you concentration of 0.500 M? うす have? I nol D03L 7mo. 0almol IL 0.1 imol 10. What volume of 2.00 M stock solution do you need to make 125 mL ofa 0.010 M solution? 11. What is the concentration of a solution made 0.01mol by diluting 55.6 mL of 3.0 M NaNO, to a new volume of 250 mL? 2L mo ニ IL 0、12JL スー1,25x10-mol 12. Express the concentration of the following solutions using mass percent. a) 0.025 niol of magnesium sulfate are dissolved in b) When all the water is boiled off from 3.4 lb of 100. mL of pure water. seawater, 14 oz. of salt remains

下線部和訳で解答が【母親たちは、娘との関係が失われたと感じて絶望するだけではなく、 つかんでいたかもしれない操りひもを1本も残さず手放してしまうことを恐れるようになる。】とありました。 文中でbut以下が肯定文なのにany threads(複数形)になっていました。 肯定文... Read More

Not only do mothers despair over feeling that their relationships with thot.. daughters have been lost, but they become terrified about surrendering anvy threads of control they may have held. (注) bristle:react angrily and defensively

この英文を和訳せよ。という問題で、解答が【母親たちは、娘との関係が失われたと感じて絶望するだけではなく、 つかんでいたかもしれない操りひもを1本も残さず手放してしまうことを恐れるようになる。】とあったのですが、 1本も残さず、という訳がなぜ出てきたのかが理解できませんでした... Read More

Not only do mothers despair over feeling that their relationships with thot.. daughters have been lost, but they become terrified about surrendering anvy threads of control they may have held. (注) bristle:react angrily and defensively

線を引いた単語の意味と訳を教えて欲しいです🙇

- New technologies have transformed the mass media. Since the 1960s, the communication satellite has made instantaneous global communication a reality. オges odi

このyetってなんですか？

3|Astronomers have found the smallest planet yet outside our ① solar system, 大文学者たちは、 weighing in at just seven-and-a-half times the mass of the Earth. ② Its discoverers say that the planet is likely to be rocky, rather than a gas giant like Jupiter.

助けてください分かりません😭

IV. The Roller Coaster A roller coaster with a mass of 500 g is pulled up a peak with a force of 4000 N by its motor. 2 1 W 30m 20m 3 es un 1. Calculate the work done as the roller coaster moves from position 1 to the top of the first peak of the ride (position 2). 2. It takes 20 seconds for the car to be pulled from position 1 to position 2.Calculate the power of the motor. 3. Calculate the amount of gravitational potential energy possessed by the roller coaster as it reaches position 2 ビ

下線部のandが結ぶかたまりがbe quite~とnot speak ~だと思ったのですが、回答が違いました。理由が知りたいです。

次の英文を読んで、下記の問いに答えなさい。 Everyone knows what is supposed to happen when two English people who have never met before come face to face ina train-they start talking about the weather. In some cases this may simply be because they happen to find the subject interesting. Most people, though, are not particularly interested in analyses of climatic conditions, so there must be other reasons for conversations of this kind. ,One explanation is that it can often be quite embarrassing to be alone in the company of someone you are not acquainted with and not speak to them. If no conversation takes place the atmosphere can become rather , strained. However, by talking to the other person about some neutral topic like the weather, it is possible to strike up a relationship without actually having to say very much. Train conversations of this kind-and they do happen, although not of course as often as the popular myth supposes-are a good example of the sort of important social function that is often fulfilled by language. Language is not simply a means of communicating information-about the weather or any other subject. It is also a very important means of establishing and maintaining relationships with other people. Probably the most important thing about the conversation between our two English people is not the words they are using, but the fact that they are talking at all.

【英語ですみません】3. a. b. c. がわかりません。 mole と amu、そしてこの単位を使うときのmolecules と atom の概念（？）がわかりません。 b. はやってみたのですが、他は問題がよくわかりません…どなたか説明お願いします🙇‍♂️🙏

Complete the following exercises to help you solidify your understand the utility of moles: The conversion factor given in the back of your book isl amu = 1.66 × 10-2/ kg. 10o0g This can be written as 1.66× 10-27 Kg ("kilograms per amu"). × Tkg amu 1. Change this conversion factor to grams per amu. 1,60xl0/amu 2. To get the number of amu per gram (the inverse), take the inverse of the number answer to #1 (divide 1 by that number). WRITE THE UNITS. -- do you recognize this number??! 3 amu kg 0gadols number 3. Since you have a conversion factor in amu(#1), you can convert from a mass in amu to one in grams. Do the following in order to demonstrate to yourself again what a mole is: a. How much does 1 molecule of SO, weigh in amu? b. How much does 1 molecule of SO, weigh in grams? 32,07+ 162)- 69.07g c. How muchdo 6.022 × 1023 (one mole of) SO, molecules weigh in grams? emoie n ftoe