Answer:
Verdadero!
no se en que mas quieres que te ayude? o cual realmente quieres que sea la respuesta?
It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Na-24 (Sodium, atomic number Z = 11, mass number A = 24).
Answer:
There are <span>1.479×<span>10<span>−13</span></span></span> concentration of hydrogen ions <span>mo<span>lL</span></span>.
Explanation:
Because pH is a logarthmic scale, we can use the formula: <span><span>[<span>H+</span>]</span>=<span>10-pH</span></span>. Where...
=> <span>[<span>H+</span>]</span> is the concentration of hydrogen ions in the solution.
=> <span>pH</span> is the pH of the solution.
=> Where 10 is the base of the power - it's a logarithm formula.
We can now just sub in the values and solve for [<span><span>H+</span>]</span>.
<span><span><span>[<span>H+</span>]</span>=<span>10-pH</span></span><span><span>=<span>10<span>−<span>(12.83)</span></span></span></span><span>=1.479108388×<span>10<span>−13</span></span></span></span></span>
We can round (if required) to <span>1.479×<span>10<span>−13</span></span></span>.
Thus, there are <span>1.479×<span>10<span>−13</span></span></span> concentration of hydrogen ions <span><span>mol</span>L</span>.
Hope this helps :)
Answer:
16 waves
Explanation:
This is actually pretty easy to understand.
First we have the frequency "f" of the waves which is 0.571429 Hz and we want to know how many waves will hit the beach in 28 s. To know this, we need to know the period time of the waves, this can be calculated with the frequency and the following expression:
T = 1/f
With this expression we can calculate the period time of the waves. So replacing the data:
T = 1 / 0.571429
T = 1.749999 s
Now that we have the period, this number means that every 1.75 s, a wave hit the beach. Now to know the number of waves in 28 s, we just divide the period with the given time:
n = t/T
Replacing we have:
n = 28 / 1.749999
<h2>
n = 16 waves</h2><h2>
This is the number of waves that hit the beach in 28 s.</h2>
repel each other because they have like charges