2007-10-01 16:27:45 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
How Do You Do It?? Please Help
2007-10-01 16:33:04 · update #1
Need Help. How Do You Do It?? I'm Trying To Look For M
2007-10-01 16:40:28 · update #2
Here is what you know from the given information:
Weight of Oxygen / weight of M(OH)2 = 32.8%
You can look of the atomic weights of Oxygen and Hydrogen on a periodic table.
Oxygen is 16.0 grams/mole http://www.webelements.com/webelements/elements/text/O/key.html
Hydrogen is 1.0 grams/mole http://www.webelements.com/webelements/elements/text/H/key.html
Next, substitute these into the equation and solve for the atomic weight of “M”.
(16.0 + 16.0) / (Metal + 16.0 +16.0 +1.0 +1.0) = 0.328
Metal = (32 / 0.328) – 34
Metal = 63.56
Now, look at the periodic table for the metal with that atomic weight. It’s Copper! http://www.webelements.com/webelements/elements/text/Cu/key.html
Note that the formula for metal hydroxides is M(OH)2 not M(OH2).
2007-10-02 06:06:45 · answer #1 · answered by Metallic stuff 7 · 0⤊ 0⤋
Oxygen has an atomic weight of 16, plus 2 for the two hydrogens at 1 a piece, means that about 1/3 of the mass of the molecule is equal to 18, so the other 2/3 must have an atomic weight of 36, which would be chlorine. But I could be wrong.
2007-10-01 23:34:33 · answer #2 · answered by Eli 6 · 0⤊ 0⤋
are you talking of Magnizium Hydroxide?
2007-10-01 23:36:13 · answer #3 · answered by Belgariad 6 · 0⤊ 0⤋