Wednesday
October 1, 2014

Posts by shemelis


Total # Posts: 11

chemistry
Hydrogen usually has an oxidation number of +1 when combined with nonmetals such as Cl (HCL), S (H2S), etc. However in metal hydrides such as NaH, CaH2, etc, its oxidation number is -1 since its electronegativity is lower than that of the element it is combined with.
October 2, 2012

chemistry
what is the reason hydrogen have -1 oxidation number?
October 2, 2012

Science 10
metal sulphide
July 26, 2012

Chemistry
10 minute is correct
May 30, 2011

CHEMISTRY (URGENT!!!!)
65,8,d,9
April 3, 2011

Physical chemistry
ice, 5,
October 10, 2010

chemistry URGENT...30 min left
good gotas our the come to be man
April 22, 2010

Chemistry
well
March 10, 2010

Chemistry
we send we
March 1, 2010

Chemistry
when temperature increase the molecule and ion move fastly that mean rate increase in the same concn and surface area
March 1, 2010

Intro to Physical Science
it a substance that their molecurle can be identified
September 9, 2006

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