what is the complete & balanced equation for the following reactions & include the catalysts if any:

1. Combustion of Methane:
2. Halogenation of Cyclopentene with Br2

4. Hydrogenation of 3-methyl-1-butyne
5. Combustion of 2-methylpropene
6. Hydrohalogenation reaction between cyclobutene and HBr

1. Combustion of Methane:

CH4 + 2O2 -> CO2 + 2H2O (No catalyst)

2. Halogenation of Cyclopentene with Br2:
Cyclopentene + Br2 -> 1,2-dibromocyclopentane (No catalyst)

3. Hydrogenation of 3-methyl-1-butyne:
3-methyl-1-butyne + H2 -> 3-methylbutane (Catalyst: usually a metal catalyst like palladium or platinum)

4. Combustion of 2-methylpropene:
2-methylpropene + 5O2 -> 4CO2 + 4H2O (No catalyst)

5. Hydrohalogenation reaction between cyclobutene and HBr:
Cyclobutene + HBr -> 1-bromocyclobutane (No catalyst)

Sure! I can help you with that. Let's break down each reaction and provide the complete and balanced equations, along with any catalysts if applicable.

1. Combustion of Methane:
Methane (CH4) reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O). This reaction is highly exothermic and does not require a catalyst.
The balanced equation for the combustion of methane is:
CH4 + 2O2 -> CO2 + 2H2O

2. Halogenation of Cyclopentene with Br2:
Cyclopentene (C5H8) reacts with bromine (Br2) to form 1,2-dibromocyclopentane (C5H8Br2). The reaction requires a halogenation catalyst, usually a radical initiator like light or heat.
The balanced equation for the halogenation of cyclopentene with Br2 is:
C5H8 + Br2 -> C5H8Br2

4. Hydrogenation of 3-methyl-1-butyne:
3-methyl-1-butyne (C5H8) reacts with hydrogen gas (H2) in the presence of a catalyst, typically a transition metal catalyst like palladium (Pd) or platinum (Pt). The reaction yields 3-methyl-1-butene (C5H10).
The balanced equation for the hydrogenation of 3-methyl-1-butyne is:
C5H8 + H2 -> C5H10

5. Combustion of 2-methylpropene:
2-methylpropene (C4H8) reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O). This combustion reaction, like the one in the first example, is highly exothermic and does not require a catalyst.
The balanced equation for the combustion of 2-methylpropene is:
C4H8 + 6O2 -> 4CO2 + 4H2O

6. Hydrohalogenation reaction between cyclobutene and HBr:
Cyclobutene (C4H6) reacts with hydrobromic acid (HBr) to form 1-bromocyclobutane (C4H7Br). This reaction proceeds through the addition of HBr across the double bond. The reaction does not require a catalyst.
The balanced equation for the hydrohalogenation reaction between cyclobutene and HBr is:
C4H6 + HBr -> C4H7Br

Remember, when balancing chemical equations, it is important to ensure that the number of atoms of each element is the same on both sides of the equation.