polymer
Sunflower is not a reaction or a polymer. It is a type of plant that belongs to the family Asteraceae, known for its large, yellow flowers and edible seeds.
Any reaction occur in this case.
Any reaction occur.
Thermodynamically favorable reaction will occur. Also, if the neutral element is higher in the activity series than the charged element, then the reaction will occur.
Any reaction occur.
An endothermic reaction need heat to occur.
A double displacement reaction will not occur if the products formed are insoluble in the solvent, if no reaction occurs between the two compounds, or if the reaction conditions are not suitable for the reaction to proceed.
If heat is required for a reaction to occur, it is an endothermic reaction. Endothermic reactions absorb heat from their surroundings in order to proceed.
Oxygen gas must be present for a combustion reaction to occur.
Chemical changes occur after a chemical reaction.
Any reaction occur.