Theme: the chemical of science. The components of matter. Substances and mixtures. Elements and compounds macroscopic and microscopic concept

Kimyo
13.04.22
Theme: the chemical of science. The components of matter. Substances and mixtures. Elements and compounds macroscopic and microscopic concept.
Simple substances: o2, h2, n2, s2.
Mixtures : h2o, co2, co
Macroscopic - ko’z bilan ko’ra oladigan.
Microscopic - ko’z bilan koi’ra olmaydigan.

• 
  Percent composition of a substance.
  

1. 
   Calculate percent composition of water H2o
   

M(h2o)= 18g/mol
W(h)= 1*2/ 18*100=11%
W(o)= 16/18*100=89.9%