Yes, the correct answer is b
Answer: -
Metals are ductile instead of brittle because they have flexible bonds.
Explanation: -
Metals have a property called ductility.
It is the ability of a metal to be drawn into wires.
Metals due to greater bond flexibility are more ductile.
The most ductile metal known to man is Gold. Metallic wires find many applications in modern machinery particularly.
Usually ductility and malleability go together.
1. An isomers, are molecules with<u> the same chemical formula</u> but <u>different structural formula.</u>
2. <span>Isomers of hexane are <u>skeletal isomers</u>. They have the same chemical formula (C</span>₆H₁₄)<span> but have different
carbon chain and different
chemical properties.
</span>
There are five isomers of hexane.
Look at the attachment :)
The energy produced by burning : -32.92 kJ
<h3>Further explanation</h3>
Delta H reaction (ΔH) is the amount of heat change between the system and its environment
(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)
The enthalpy and heat(energy) can be formulated :

The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol.
The energy released for 0.8210 g of naphthalene :
