Some ways science benefits the science is by studying and making new treatements and helping the society
Answer:
Chromatography is the separation of a mixture by passing it in solution or suspension or as a vapor. It's mainly used for separation and analytical study of organic and inorganic mixtures.
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the oxidation number of carbon in MgCO3 = +IV
the oxidation number of carbon in CO2 = +IV
so, there is no change
Answer:
% comp. H = 2.8%, % comp. Cl = 97.2%
Explanation:
HCl mass = mass of H + mass of Cl
HCL mass = 1.00794 + 35.453 = 36.46094
% comp. of H = 1.007694 / 36.46094 x 100 = around 2.8% (2.76376308455)
% comp. of Cl = 35.453 / 36.46094 x 100 = around 97.2% (97.2355622208)
Option C. A compound being separated into 2 elements represents a chemical change.