Answer:
In diamond the carbon atoms are covalently bonded as flat sheets
In silicon(IV) dioxide the silicon and oxygen atoms are covalently bonded in flat sheets
The structure of copper includes a lattice of positive ions
Explanation:
Diamond and silicon(IV) dioxide are covalent network solids. Covalent network solids are made up of atoms joined to one another by covalent bonds to form a giant lattice, The solids are hard and have a very high melting point. They do not conduct electricity. So, for both diamond and SiO2, atoms are covalently bonded to yield flat sheets in a covalent bonded network solid.
Copper is a metallic substance having metallic bonds, a metallic crystal consists of positive ions and a cloud of electrons.
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
Las concentraciones en el equilibrio para la reacción química presentada son:
![[A] = [B] = 1-x = 1-0.69 = 0.31 M\\[C] = [D] = x = 0.69 M](https://tex.z-dn.net/?f=%5BA%5D%20%3D%20%5BB%5D%20%3D%201-x%20%3D%201-0.69%20%3D%200.31%20M%5C%5C%5BC%5D%20%3D%20%5BD%5D%20%3D%20x%20%3D%200.69%20M)
Consideremos la siguiente reacción química genérica:
A + B ⇄ C + D
Para calcular las concentraciones en el equilibrio, debemos construir una Tabla ICE. Cada fila representa una instancia (Inicial, Cambio, Equilibrio) y la completamos con la concentración o cambio de concentración ("x" para concentraciones desconocidas). Como inicialmente no hay productos, la reacción se desplazará hacia la derecha para alcanzar el equilibrio.
A + B ⇄ C + D
I 1 1 0 0
C -x -x +x +x
E 1-x 1-x x x
La constante de equilibrio, Kc, es:
![Kc = 5 = \frac{[C][D]}{[A][B]} = \frac{x^{2} }{(1-x)^{2} } \\\sqrt{5} = x/1-x\\x = 0.69](https://tex.z-dn.net/?f=Kc%20%3D%205%20%3D%20%5Cfrac%7B%5BC%5D%5BD%5D%7D%7B%5BA%5D%5BB%5D%7D%20%3D%20%5Cfrac%7Bx%5E%7B2%7D%20%7D%7B%281-x%29%5E%7B2%7D%20%7D%20%5C%5C%5Csqrt%7B5%7D%20%3D%20x%2F1-x%5C%5Cx%20%3D%200.69)
Las concentraciones en el equilibrio son:
![[A] = [B] = 1-x = 1-0.69 = 0.31 M\\[C] = [D] = x = 0.69 M](https://tex.z-dn.net/?f=%5BA%5D%20%3D%20%5BB%5D%20%3D%201-x%20%3D%201-0.69%20%3D%200.31%20M%5C%5C%5BC%5D%20%3D%20%5BD%5D%20%3D%20x%20%3D%200.69%20M)
Puedes aprender más sobre equilibrio químico aquí: brainly.com/question/21632386