To determine the number of potassium laid side by side by a given distance, we simply divide the total distance to the diameter of each atom. The diameter is twice the radius of the atom. We calculate as follows:
number of atoms = 4770 / 231x10^-12 = 2.06x10^13 atoms
1. Determine the balanced chemical equation for the chemical reaction
2. Convert all given information into moles ( most likely, through the use of molar mass as a conversion factor).
3. Calculate the mole ratio from the given information.
Answer:
a process in which one or more substances, the reactants, are converted to one or more different substances, the products.
Explanation:
Answer:
0.145 moles de AlBr3.
Explanation:
¡Hola!
En este caso, al considerar la reacción química dada:
Al(s)+Br2(l)⟶AlBr3(s)
Es claro que primero debemos balancearla como se muestra a continuación:
2Al(s)+3Br2(l)⟶2AlBr3(s)
Así, calculamos las moles del producto AlBr3 por medio de las masas de ambos reactivos, con el fin de decidir el resultado correcto:
![n_{AlBr_3}^{por\ Al}=4.00gAl*\frac{1molAl}{27gAl} *\frac{2molAlBr_3}{2molAl}=0.145mol AlBr_3\\\\n_{AlBr_3}^{por\ Br_2}=42.00gr*\frac{1molr}{160g Br_2} *\frac{2molAlBr_3}{3molBr_2}=0.175mol AlBr_3](https://tex.z-dn.net/?f=n_%7BAlBr_3%7D%5E%7Bpor%5C%20Al%7D%3D4.00gAl%2A%5Cfrac%7B1molAl%7D%7B27gAl%7D%20%2A%5Cfrac%7B2molAlBr_3%7D%7B2molAl%7D%3D0.145mol%20AlBr_3%5C%5C%5C%5Cn_%7BAlBr_3%7D%5E%7Bpor%5C%20Br_2%7D%3D42.00gr%2A%5Cfrac%7B1molr%7D%7B160g%20Br_2%7D%20%2A%5Cfrac%7B2molAlBr_3%7D%7B3molBr_2%7D%3D0.175mol%20AlBr_3)
Así, inferimos que el valor correcto es 0.145 moles de AlBr3, dado que viene del reactivo límite que es el aluminio.
¡Saludos!