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國中理化和數學~

Aug 24th 2013, 09:52

1.C
溫度越高溶越多(在沸點內)

2.答案應該是2400
2.4g/cm^3X1kg/1000gX1000000cm^3/1m^3
=2400kg/m^3
做法不對請指教

3.A
A-鈉
B-銀
C-鎂
D-金
鈉的活性很大,大到碰到水會產生氫氣燃燒甚至爆炸
所以不宜放在水中,一般鈉都是存放在油裡的
順代一提,鉀(K)的活性比納還要大所以也不宜放在水中

參考資料我

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