Number of Atom
2012-01-15 2:57 am
圖片參考：https://lewis.chem.sfu.ca/res/sfu/batchelo/Gallery/solids.and.liquids/acoin.cyl.gif
The density of aluminum is 2.70 g/cm3, and the average mass for one aluminum atom is 4.48×10-23 g.
Eight identical aluminum coins are found to displace a total of 3.20 mL of water when immersed in a graduated cylinder containing water.
How many atoms are present in one such aluminum coin?
Thanks =]
回答 (1)
2012-01-15 3:21 am
✔ 最佳答案
Volume of water displaced by 1 coin = 3.20/8 = 0.4ml Mass of 1 coin = 2.70x0.4 = 1.08
No. of atoms in 1 coin = 1.08/(4.48x10-23)
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120114000051KK00729