For determining bridging carbonyls:
• Examine the geometry and bonding of the complex.
• Bridging carbonyls are shared between two metal centers, while terminal carbonyls are bonded to a single metal atom.
1. Bridging Carbonyls in W(CO)6:
- Tungsten hexacarbonyl (W(CO)6) has an octahedral geometry, and all carbonyl ligands are terminal.
- Number of bridging carbonyls: 0.
2. Bridging Carbonyls in Mn2(CO)10:
- Manganese decacarbonyl (Mn2(CO)10) has a metal-metal bond with all carbonyls being terminal in its structure.
- Number of bridging carbonyls: 0.
3. Total Bridging Carbonyls:
- Sum = 0 + 0 = 0.
Consider the following reaction sequence.

In the given figure, the blocks $A$, $B$ and $C$ weigh $4\,\text{kg}$, $6\,\text{kg}$ and $8\,\text{kg}$ respectively. The coefficient of sliding friction between any two surfaces is $0.5$. The force $\vec{F}$ required to slide the block $C$ with constant speed is ___ N.
(Given: $g = 10\,\text{m s}^{-2}$) 