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理科 中学生

理科 溶解度 分からないところがあります! (2)が解説を見てもよく分かりません… なぜそういう式になってこの答えになるのかがよく分からないので教えてください! 1枚目が問題で、2枚目3枚目が解説です!

水溶液の性に関する実験を行った。 右の図は物質Aと物質Bの溶解度曲線である。 あとの問 いに答えなさい。 [富山県] (8点×5) 250 【実験1】 60℃の水200gを入れたビーカーに物質 Aを300g加えてよくかき混ぜたところ,とけきれず に残った。 ⑨ ビーカーの水溶液を加熱し,温度を80℃まで上げ たところ、 すべてとけた。 さらに水を加熱し、沸騰させ、水をいくらか蒸発させた。 ③ 水溶液の温度を30℃まで下げ,出てきた固体をろ過でとり出した。 【実験2】 て飽和水溶液をつくった。 オの水溶液の温度を20℃まで下げると, 物質Bの固体が少し出てきた。 Q1) で温度を80℃まで上げた水溶液にはあと何gの物質Aをとかすことができるか。図を参考 ] に求めよ。 100 g 200 物水 質に 150 100 物質の質量 50 「物質A] 物質B 0 0 20 40 60 80 100 水の温度 [℃] 新たに用意したビーカーに 60℃の水200gを入れ、 物質Bをとけるだけ加え (2) において,ろ過でとり出した固体は228gだった。⑦で蒸発させた水は何gか。ただし, 30℃における物質Aの溶解度は 48g である。 理科

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TOEIC・英語 大学生・専門学校生・社会人

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5 Reading Passage 10 15 20 Yuna Kim is one of the world's best figure skaters. At the 2010 Winter Olympics in Vancouver, she set three world records. In fact, one of those world records broke a record she set in 2009. program and a At the Olympics, both male and female skaters perform a short seven program. In the short program, skaters have less than three minutes to perform required jumps, spins, or other moves. While doing these seven things, the skaters also have to show judges how well they can put these elements together into a kind of dance performance on the ice. The long program is similar to the short program except that skaters perform for a longer time and have more required moves. long Before the 2010 Winter Olympics began, many people thought Yuna Kim was likely to win a gold medal. Certainly, there were other women skaters who had the skill to win gold at the Olympics. However, Ms. Kim had an advantage. She had already set a number of world records. In 2007, she set the record for the highest score in a short program with 71.95 points in Japan. The same year she also set the world record for the highest score in a long program with 133.7 points in Russia. Then, in 2009 she beat her own record in the short program by scoring 76.12 in the United States. At that competition, she also became the first woman to score over 200 points with her short and long programs - her combined score was 207.71. The next year at the Winter Olympics in Vancouver, she broke her records again. In the short program, Ms. Kim scored 78.5, a new world record. In the long program, she scored 150.06, another world record. This gave her a combined total of 228.56 points, a third world record! Needless to say, her score was enough to win gold.

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