Answer:
CF4
Molecular geometry- tetrahedral
Electron geometry- tetrahedral
NF3
-molecular geometry - trigonal pyramidal
Electron geometry - tetrahedral
OF2
Molecular geometry - bent
Molecular geometry - tetrahedral
H2S
Molecular geometry- bent
Electron geometry - tetrahedral
Explanation:
According to Valence Shell Electron Pair Repulsion Theory, the shape of a molecule depends on the number of electron pairs on the valence shell of the central atom in the molecule.
For all the compounds listed, the central atom has four points of electron density. This correspond to a tetrahedra electron pair geometry. The presence of lone pairs on the central atom of OF2,NF3 and H2S accounts for the departure of the observed molecular geometry from the geometry and idealized bond angle predicted on the basis of the VSEPR theory.
Balance the equation first:
1C4H10 + 13O2 ----> 8CO2 + 10H2O
As we know oxygen is in excess, butane is the limiting reactant.
the ratio between butane and CO2 is 1-8
Therfore
1:8
6:x
x=48
48 moles of CO2 will be produced
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Use the equation d = s · t where:
s = speed
t = time
d = distance
Plug in the given distance and speed:
20 = 12 ·t
Divide both side by 12 to isolate for t:
20/12 = t
Simplify:
5 / 3 = t
Therefore, it took 5/3 hours to bike. We can convert this to minutes if necessary:
5/3 · 60 min (in one hour) = (60 · 5) / 3 = 100 min.
Answer:
[Cl₂] = 0.1804M
Explanation:
The reaction of Si with Cl₂ is:
Si(s) + 2Cl₂(g) ⇄ SiCl₄(g)
Where equilibrium constant, k, is:
k = 0.30 = [SiCl₄] / [Cl₂]²
<em>Si(s) is not in the equilibrium reaction because pure solids don't take part in the equilibrium.</em>
As initial concentration of SiCl₄ is 0.10mol / 1L = 0.10M, when the equilibrium is established, concentrations are:
[SiCl₄] = 0.10M - X
[Cl₂] = 2X
<em>Where X is the reaction coordinate.</em>
Replacing in k equation:
0.30 = [0.10-X] / [2X]²
0.30 = [0.10-X] / 4X²
1.2X² = 0.10 - X
1.2X² + X - 0.10 = 0
<em>Solving for X:</em>
X = - 0.92M → <em>False solution. There is no negative concentrations.</em>
X = 0.0902M → Right solution.
[Cl₂] = 2×0.0902M = 0.1804M
<h3> [Cl₂] = 0.1804M</h3>