metal M is GroupII element .
2 moles of the metal carbonate weight 295.2g.
what is the relative atmoic mass of M
CHEM F.4 40MARKS
2007-04-01 12:37 am
回答 (3)
2007-04-01 12:51 am
✔ 最佳答案
The chemical formula of the metal carbonate is MCO3.Reminder:
Number of moles = Mass / Molar mass
Let y be the relative atomic mass of M.
2 = 295.2 / [ y + ( 12 + 16.0 x 3 ) ]
2 = 295.2 / ( y + 60 )
y = 87.6
Therefore, the relative atomic mass of M is 87.6.
參考: My Own Chem Knowledge
2007-04-01 12:54 am
let the atomic mass of metal M be m
the molecular mass of MCO3=12+16*3+m
=m+60
=mass/no of mole
=295.2/2
=147.6
So,m=87.6g/mol
the molecular mass of MCO3=12+16*3+m
=m+60
=mass/no of mole
=295.2/2
=147.6
So,m=87.6g/mol
參考: F.6 student
2007-04-01 12:52 am
carbonate CO3 係 2-
M 係 GROUP 2 即係 2+
即係 MCO3
MOLE = MASS/ MOLAR MASS
2 = 295.2/ ( M+12+16*3)
( M+12+16*3) = 295.2 /2
M+12 =147.6 - 48
M = 99.6 - 12
M = 87.6 g mol-1
M 係 Sr (Strontium)
M 係 GROUP 2 即係 2+
即係 MCO3
MOLE = MASS/ MOLAR MASS
2 = 295.2/ ( M+12+16*3)
( M+12+16*3) = 295.2 /2
M+12 =147.6 - 48
M = 99.6 - 12
M = 87.6 g mol-1
M 係 Sr (Strontium)
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