Grade

Type of questions

Science Junior High

(1)の問題で、どういう計算をしたらアになるんでしょうか?解説読んでも分かりませんでした。2枚目が解説です。

2 2 ■8点×2 ~ 水にとけた物質をとり出すために,温度が20℃の部屋で、 次の (a) (d)の手順で実験を行った。 表は100gの水にとける物質の質量の 限度と水の温度の関係を表したものである。 (1) <兵庫一部略 〉 P 実験 (a) ビーカーA~Cにそれぞれ80℃の水150gを入れ,ビーカーA には塩化ナトリウム, ビーカーBにはミョウバン, ビーカーCに は硝酸カリウムをそれぞれ50gずつ入れてとかした。 |(2) 10,2 % (b) ビーカーA~Cの水溶液をゆっくり20℃まで冷やしたところ, 結晶が出てきた水溶液があった。 (c) 結晶が出てきた水溶液をろ過して,とり出した 結晶の質量をはかった。 (d) とり出した結晶を薬さじで少量とり, スライド ガラスの上にのせて、顕微鏡で観察した。 1 100:31.6=150:X 水の温度[℃] 20 40 60 80 物質 X 塩化ナトリウム [g] 35.8 36.3 37.1 38.0 2.5 C ミョウバン 〔g〕 11.4 23.8 57.4 321.6 310.2 硝酸カリウム [g] 31.6 63.9 109.2 168.8 137.2 100x =150×3.6 x=674 (1) 顕微鏡で図のように観察した結晶について, 手順 (c) ではかった 質量として最も適切なものを,次のア~オから1つ選び、記号で答え なさい。 ア 2.6g イ 11.4g ウ 14.2g I 18.4g オ 31.6g (2)手順(c)において, 結晶をとり出したあとの水溶液の質量パーセ ント濃度を求めた。 このとき, 求めた値が最も小さい水溶液の質量パー セント濃度は何%か, 四捨五入して小数第1位まで求めなさい。

Resolved Answers: 2
English Senior High

問4の⑤の計算はどうすれば合うのですか。 教えてください🙇‍♀️ 3枚目が答えです。

次の英文を読んで,下の設問に答えなさい。 Last year, 4.2 million babies died. That is the most recent number reported by UNICEF of deaths before the age of one, worldwide. We often see lonely and emotionally charged numbers like this in the news or in the materials of activist groups or organizations. They produce a reaction. Who can even imagine 4.2 million dead babies? It is so terrible, and even worse when we know that almost all died from easily preventable diseases. And how can anyone argue that 4.2 million is anything other than a huge number? You might think that nobody would even try to argue (that, but you would be wrong. That is exactly why I mentioned this number. Because it is not huge: it is beautifully small. If we even start to think about how tragic each of these deaths is for the parents who had waited for their newborn to smile, and walk, and play, and instead had to bury their baby, then this number could keep us crying for a long time. But who would be helped by these tears? Instead let's think clearly about human suffering. The number 4.2 million is for 2016. The year before, the number was 4.4 million. The year before that, it was 4.5 million. Back in 1950, it was 14.4 million. That's almost 10 million more dead babies per year, compared with today. Suddenly this terrible number starts to look smaller. In fact (2)the number has never been lower. Of course, I am the first person to wish the number was even lower and falling even faster. But to know how to act, and how to prioritize resources, nothing can be more important than doing the cool-headed math and realizing what works and what doesn't. And this is clear: more and more deaths are being prevented. comparing the numbers. (3). We would never realize that without

Resolved Answers: 1
25/1000