What two general products do combustion reactions

Reaction of combustion, always generate CO₂ and H₂O, with O₂ as a reactant.

Explanation:

The combustion reaction is a type of exothermic chemical reaction, where carbon dioxide and water are generated, as products. It is an exothermic reaction where heat is released and a flame is formed. When combustible substances react to the maximum possible degree of oxidation, we speak of complete combustion.

This is the combustion for methane:

CH₄ (g)  + 2O₂(g)  →  CO₂(g)  +  2H₂O (g)

This is the combustion for propanol

2C₃H₇OH (l)  +  9O₂(g)  →  6CO₂(g)   +   8H₂O (g)

This is the combustion for acetic acid

CH₃COOH (l)  +   2O₂(g)  →  2CO₂(g)   +  2H₂O (g)

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.