Q. 2.8g of a metal M combines with 1.2g of oxygen to form an oxide with formular M2O3, What is the relative atomic mass of M?
Q(2).[13M]
A mixtire of zinc oxide is heated.After strong heating for 30 mins,0.52g of a gaseous product A is formed.The residue is then heated strongly with excess carbon.0.70g of another gaseous product B is formed after the reaction is complete.
(a)Identify the two gaseous product in the reactions involved.
(b)Write chemical equations for the reactions as described above.
(c)Calculate the percentage by mass of zinc oxide in the mixture.
chemistry Q.(atomic mass)
2011-01-03 7:48 am
回答 (2)
2011-01-03 9:24 am
✔ 最佳答案
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參考: Calculated by myself
2011-01-03 9:09 am
Q.
Let y be the relative atomic mass of M.
Mass ratio M : O = 2.8 : 1.2 = 2y : 3(16)
2.4y = 134.4
y = 56
Relative atomic mass of M = 56
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Q(2).
The question may be incomplete. Apart from zinc oxide, what substance is also present in the mixture.
Let y be the relative atomic mass of M.
Mass ratio M : O = 2.8 : 1.2 = 2y : 3(16)
2.4y = 134.4
y = 56
Relative atomic mass of M = 56
=====
Q(2).
The question may be incomplete. Apart from zinc oxide, what substance is also present in the mixture.
參考: micatkie
收錄日期: 2021-04-13 17:44:35
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