Full Question:
Why do we use other bonding theories in addition to the lewis model?
a) Lewis model is not suitable for all molecules or ions. b) Lewis model cannot predict all of the properties of a molecule or ion. c) Lewis model is too complicated.
Answer:
b) Lewis model cannot predict all of the properties of a molecule or ion.
Explanation:
Lewis structures, also called electron-dot structures or electron-dot diagrams, are diagrams that show the bonding between atoms of a molecule, and the lone pairs of electrons that may exist in the molecule.
Lweis model does not explain the geometry of molecules, how the bonds form, or how the electrons are shared between the atoms hence the need to use other bonding theories.
The answer is Efflorescent hydrate. <span>They are chemical substances that, when exposed to the atmosphere, release water. A typical example of this chemical reaction is cement, when mixed with water, the mixture hardens due to hydration, then the cement starts to lose water.</span>
She used 1 cup less than the amount that she made when she decided to make pancakes. We have no idea how much she had to begin with.
Answer:
imma go with either b or A
Answer:
58.8 Joules work must be done
Explanation:
Equations of motion related distance, velocity and acceleration:
v² - v₀² = 2 x acc x Δdistance
so acc = (0 - 28²)/ (2 x 0.8 m) = -490 m/s² (negative acceleration means deceleration)
Ave force F to decelerate mass 0.15 kg = m x a = 0.15 x 490 = 73.5 Newtons
Work done W = Force x distance = 73.5 N x 0.8 m = 58.8 Nm (i.e. Joules)
