國中自然2下1-1_
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7th - 9th Grade
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Tang Da
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
真真操作碳酸鈉溶液加氯化鈣溶液的實驗:反應前所有溶液與容器的質量總和為W1,反應後測得總質量為W2,則W1與W2的大小比較,下列何者正確?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
真真操作碳酸鈉溶液加氯化鈣溶液的實驗,反應前所有溶液與容器的質量總和為W1,而應後測得總質量為W2。若W1=W2,則由實驗的結果可以說明下列何者?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
燃燒後的蠟燭,質量會變輕,其原因為何?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
將一密閉的化學裝置置於天平上秤量,如附圖所示,當氯化鈣溶液與碳酸鈉溶液混合反應後,下列相關的敘述何者正確?
會有沉澱物產生,重量增加
沉澱物為NaOH
本實驗可用以說明質量守恆定律
天平的右盤會向下傾
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
阿元分別取質量不等的銅粉在空氣中加熱,全部銅粉均變成黑色後,稱其總質量,結果如附圖所示,則2公克的銅可與多少公克的氧化合?
0.5公克
0.75公克
1.5公克
2.5公克
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
小寶做碳酸鈉溶液與氯化鈣溶液反應前後的質量變化實驗,則他會得到何種結果?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
大頭將小蘇打放在密閉的試管中加熱,發現反應後會有氣體產生,此時小蘇打與試管之總質量會如何改變?
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