We are provided with
4.35 g of phosphoric acid
5.25 g of KOH
3.15 g of K3PO4 produced
The reaction formula is
H3PO4 + 3KOH => K3PO4 + 3H2O
Initially, convert the given masses into moles.
Then, identify the limiting reactant. Afterward, calculate the maximum K3PO4 that can be generated from the limiting reactant.
Finally, compute the percent yield by dividing the actual yield by the theoretical yield.
From our knowledge:
-Atomic Mass = Protons + Neutrons
-Atomic Number equates to protons
Magnesium possesses an atomic number of 12, indicating that its naturally occurring isotope is Mg-12 (with 12 protons and 12 neutrons). In total, the atomic mass amounts to 24 amu. If we add another neutron to create Mg-13, the atomic mass will be 25 amu.
We can express this situation mathematically:
(amu of isotope 1)x + (amu of isotope 2)(x-1) = Average atomic mass
Here, isotope 1 represents the fractional abundance we're determining.
When substituted, it looks as follows:
24x + 25(1-x) = 24.3
Now let’s solve for x:
24x + 25 - 25x = 24.3
-x + 25 = 24.3
-x = -0.7
x = 0.7
Thus, the fractional abundance of Mg-12 is 0.7, or 70%.<span />
Answer:
Cuando dos átomos se acercan entre sí, se genera un compuesto al compartir pares de electrones que cada uno de los átomos aporta, permitiéndoles alcanzar los 8 electrones de valencia (octeto) en su capa externa.
Explanation:
La configuración electrónica del elemento puede escribirse de la siguiente manera;
1s²2s²2p⁴
La configuración electrónica dada es equivalente a la del oxígeno, por lo tanto, tenemos;
El número de electrones en la capa de valencia = 2 + 4 = 6 electrones
Por consiguiente, cada átomo necesita 2 electrones para completar sus 8 electrones (octeto) en la capa externa.
Al acercarse los dos átomos, reaccionan y se combinan para formar un compuesto al compartir 4 electrones, 2 de cada átomo, de modo que cada átomo obtenga 2 electrones adicionales en su órbita externa en el nuevo compuesto y así se logre la configuración estable de octeto para cada uno de los átomos en el compuesto recién formado.
Answer:
Angle ABE measures 27°.
Explanation:
Refer to the attached diagram related to this question.
The given values are ∠ABE=2n+7 and ∠EBF=4n-13.
Clearly seen in the diagram, ∠ABE and ∠EBF are equal in measure.
Move variable components to one side of the equation.
Split both sides by 2.
The solution for n arrives at 10.
The next step is to calculate ∠ABE.
Consequently, the measurement of angle ABE is 27°.
CxHy + (x+0.25)O₂ → xCO₂ + 0.5yH₂O
m(CO₂)/{xM(CO₂)}=m(H₂O)/{0.5yM(H₂O)}
0.2845/{44.01x}=0.1451/{9.01y}
x/y=0.4=2:5
The empirical formula is C₂H₅.
