(秤量瓶+蓋)重34.334克
(秤量瓶+蓋+水)重68.321克(於25度C)
(秤量瓶+蓋+甲醇)重61.313客
(秤量瓶+蓋+金屬Cd+甲醇)重99.909客
求出甲醇及金屬Cd密度為多少?
麻煩請附詳解,拜託了各位高手
2005-10-12 15:15:43 · 6 個解答 · 發問者 Anonymous in 科學 ➔ 其他:科學
它題目就是出這樣的呢,金屬Cd指的是金屬鎘,我也不知道為什麼會有這一個條件呢....
2005-10-12 18:17:33 · update #1
阿~~~少了這個條件啦
(秤量瓶+蓋+金屬Cd+)重76.720客
2005-10-23 03:48:45 · update #2
水重=68.321-34.334 = 33.987 g 即體積為 33.987 cm3甲醇重=61.313-34.334 = 26.979 g 則甲醇密度為 26.979/33.987 = 0.79 g/cm3(秤量瓶+蓋+金屬Cd+甲醇)重99.909g(秤量瓶+蓋+金屬Cd+)重76.720g 甲醇重=99.909-76.720 = 23.189 甲醇體積=23.189/0.79 = 29.35 cm3 金屬鎘體積=33.987-29.34 = 4.63cm3 金屬鎘重量=76.72-34.334 = 42.386g 金屬鎘密度=42.386/4.63 = 9.15 g/cm3
2005-10-12 18:15:18 · answer #1 · answered by Frank 7 · 0⤊ 0⤋
靠 化學結報的題目你也放上來=__=
2008-10-13 18:28:04 · answer #2 · answered by ? 2 · 0⤊ 0⤋
25度C時 水的密度不等於1....
2007-10-28 13:31:42 · answer #3 · answered by 短腿明翰 1 · 0⤊ 0⤋
這是我們老師出的題目
2005-10-12 16:23:44 · answer #4 · answered by Anonymous · 0⤊ 0⤋
對對對!!!! 條件不足!!無體積怎求密度????
2005-10-12 15:47:04 · answer #5 · answered by Anonymous · 0⤊ 0⤋
好像條件不足..
2005-10-12 15:30:20 · answer #6 · answered by Anonymous · 0⤊ 0⤋