The 2 represents that it is a double carbon bond
it looks like..
C-C = C-C
From shortest wavelength to longest wavelength: ultraviolet ,visible light ,infrared
The answer to this problem is a physical change
Answer:
Ammonia acts as an Arrhenius base because it increases the concentration of OH⁻ in aqueous solution.
Explanation:
The acid-base theory of Arrhenius explains that in aqueous solutions both acid and base dissociate, releasing ions in the solution. The acid release the ion H⁺ and some anion, and the base release the ion OH⁻ and some cation.
In water, the reaction of ammonia is:
NH₃ + H₂O ⇄ NH₄⁺ + OH⁻
Because of that, ammonia is an Arrhenius base.
3, 2, 1, 6
Explanation:
To balance the chemical equation the number of atoms of each element
entering the reaction have to be equal to the number of atoms of each
element leaving the reaction, in order to conserve the mass.
In our case we have:
3 CaCl₂ + 2 Na₃PO₄ → Ca₃(PO₄)₂ + 6 NaCl
So the stoechiometric coefficients will be:
3, 2, 1, 6
Learn more about:
balancing chemical equations
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