
物質2年4章 化学変化と質量
Authored by sho amano
Chemistry
8th Grade

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1.
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1 min • 1 pt
密閉容器内で炭酸水素ナトリウムとうすい塩酸を反応させると,容器全体の質量は,化学変化の前後でどうなるか。
2.
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1 min • 1 pt
うすい硫酸とうすい塩化バリウム水溶液を混ぜ合わせて反応させると,白い沈殿ができる。このとき,化学変化の前後で全体の質量は変化するか。
3.
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1 min • 1 pt
化学変化の前後で,物質全体の質量が変化しないことを何の法則というか。
4.
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1 min • 1 pt
質量保存の法則が成り立つのは,化学変化の前後で原子の何と何が変わらないからか。
5.
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1 min • 1 pt
化学変化に関係する物質の質量の比は,いつもどのようになっているか。
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