For a 1st order reaction:
In(n/n0)= -k * (time difference)
so k= - In (n/n0)/ (t/t0)
n is concentration at time t and n0 is the concentration at an earlier time t0.
where k is constant.
Answer:Aspirin is synthesized by esterification reaction of salicylic acid and acetic acid in the presence of phosphoric acid. Phosphoric acid acts as a catalyst and fastens the speed of reaction. It protonates the carboxyl group of salicylic acid and favors the esterficiation reaction.
Explanation:
Chemical Property(s):
Toxicity.
Reactivity.
Types of chemical bonds formed.
Coordination number.
Oxidation states.
Flammability.
Heat of combustion.
Enthalpy of formation.
I know these are chemical properties because they are all a result of a chemical change. Chemical changes change the form of an object. For example, diluting orange juice by adding water changes it's ph from an acid to almost neutral.
Hope this helps!
~Science Nerd
2Na (s) + Cl2 (g) = 2NaCl (s)
<span>If you give it a good search, the most used answer would probably be as follows,
</span><span>In 1914 Henry Moseley found a relationship between an element's X-ray wavelength and its atomic number (Z), and therefore rearranged the table by nuclear charge / atomic number rather than atomic weight. Before this discovery, atomic numbers were just sequential numbers based on an element's atomic weight. Moseley's discovery showed that atomic numbers had an experimentally measurable basis.
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Hope this helps!