國中 解答

一般家中的剩飯剩菜,常放在冰箱中以減緩食物的腐敗速度,其原理符合何種影響反應速率的因素?

體積莫耳濃度為 0.1 M 的蔗糖水溶液,代表 1 公升溶液中含有多少莫耳的蔗糖?

下列何者可用來判定水溶液是否為酸性?

皮膚觸及稀硫酸,最好的處理方法為何?

大部分金屬的冶煉是利用金屬礦進行下列何種反應?

乾粉滅火器是利用高壓氮將乾粉(碳酸氫鈉)噴向火源,以受熱分解出的二氧化碳滅火,其反應式為xNaHCO3→yNa2CO3+zCO2+wH2O,平衡後下列何者正確?

鎂和氧加熱生成氧化鎂,鎂消耗 15 公克,則氧消耗多少公克(Mg=24)?

若甲對碳原子(C-12)的質量比為 2:1,則甲的原子量為何?

取相同數目的甲原子與碳原子做質量的比較,結果質量比為4:3,試問甲的原子量應該為何?

平平操作加熱小蘇打的實驗,如附圖所示,試問南南在密閉容器中進行此實驗的主 要目的可能為何?

Let the children over there and have dinner together.

Tom speaks than Anny. He can talk to the foreigners.

Mom asked me to think before I joined the school team.

Emma, please make at home and enjoy the party.

Who is the most clerk in the store?

Judy did more homework than Lucas.

This is movie of the year.

Sandy: does the music sound to you? Mike: It sounds beautiful.

The peaches look . Let’s try some.

Your shoes are a little larger than .

Schools usually ________ in September after a long summer vacation.

Judy had a _________. She probably caught a cold.

Jack is a _________ baseball player. He can play baseball _________.

Roger has a _________ to get a gift.