What is always true of a combustion reaction?

carbon dioxide will be produced

the reaction absorbs energy

oxygen gas must be one of the reactants

one reactant must contain carbon

answer: oxygen gas must be one of the reactants

explanation: combustion reaction is a reaction in which a substance burns in the presence of oxygen to give large amounts of energy.

a) carbon dioxide is produced when hydrocarbons undergo combustion reaction.

b) combustion reactions are almost always accompanied by release of energy, they are exothermic reactions.

c) combustion takes place in the presence of molecular oxygen which is present in gaseous form   thus oxygen gas must be one of the reactants

d) it is not necessary. even inorganic compounds undergo combustion.

In all combustion reactions, or in order for a reaction to be a combustion reaction, it must involve oxygen gas (o2) as one of the reactants.

Exothermic,  physical change after it is already baked

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !