Answer:
1.0 x 10⁻⁸ M.
Explanation:
<em>∵ [H⁺][OH⁻] = 10⁻¹⁴.
</em>
∵ [H⁺] = 100 [OH⁻].
∴ 100 [OH⁻][OH⁻] = 10⁻¹⁴.
∴ 100 [OH⁻]² = 10⁻¹⁴.
[OH⁻]² = 10⁻¹⁴/ 100 = 1.0 x 10⁻¹⁶.
<em>∴ [OH⁻] = √(1.0 x 10⁻¹⁶) = 1.0 x 10⁻⁸ M.
</em>
Answer:
CO₃²⁻ + Zn²⁺ → ZnCO₃(s)
Explanation:
The net ionic equation is defined as a chemical equation for a reaction that lists only those species participating in the reaction.
In the reaction of sodium carbonate (Na₂CO₃) with zinc iodide (ZnI₂) that produce solid zinc carbonate (ZnCO₃) and a solution of sodium iodide (NaI) the formula is:
2Na⁺ + CO₃²⁻ + Zn²⁺ + 2I⁻ → ZnCO₃(s) + 2Na⁺ + 2I⁻
The net ionic equation is:
<em> CO₃²⁻ + Zn²⁺ → ZnCO₃(s)</em>
<em></em>
I hope it helps!
Answer is: <span>a. two 511 kEv photons are formed.
</span><span>When the positrons reach thermal energies, they start to interact with electrons by annihilation.</span>
Positron-emission tomography<span> (</span>PET)<span> is a </span>nuclear medicine functional imaging<span> technique that is used to observe metabolic processes in the body. The system detects pairs of </span>gamma rays<span> emitted indirectly by a </span>positron<span>-emitting </span>radionuclide.
I think there are two choices that would be correct. The ideas by the Ancient Greeks that is least partially supported by scientific experiments are light is a stream of rays that comes with great velocity from the eyes of an observer and it is the result of rays that leave the eyes, reflect off an object, and interact with sunlight to become visible. It was the Greeks who laid out basic laws about reflection and refraction where they found that the angle of incidence is the same as the angle of reflection. They thought light rays came from the eye and that it travels towards the object which results to the objects as visible. This was called the concept of intromission.<span />
When you cook the egg, you are changing the egg from a gooey liquid to a soft solid. So, liquid to solid is chemical change, so yeah? ...