Wednesday
April 16, 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.

chemistry
what is the reason hydrogen have -1 oxidation number?

Science 10
metal sulphide

Chemistry
10 minute is correct

CHEMISTRY (URGENT!!!!)
65,8,d,9

Physical chemistry
ice, 5,

chemistry URGENT...30 min left
good gotas our the come to be man

Chemistry
well

Chemistry
we send we

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

Intro to Physical Science
it a substance that their molecurle can be identified

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