wht are four of the factors that affect the rate of a chemical reaction.?

Answer 1

Reactant concentrations, which usually make the reaction happen at a faster rate if raised through increased collisions per unit time,
Surface area, the amount of the substance being used,
Pressure, by increasing the pressure, you decrease the volume between molecules. This will increase the frequency of collisions of molecules.
Activation energy, which is defined as the amount of energy required to make the reaction start and carry on spontaneously. Higher activation energy implies that the reactants need more energy to start than a reaction with a lower activation energy.
Temperature, which hastens reactions if raised, since higher temperature increases the energy of the molecules, creating more collisions per unit time,
The presence or absence of a catalyst. Catalysts are substances which change the pathway (mechanism) of a reaction which in turn increases the speed of a reaction by lowering the activation energy needed for the reaction to take place. A catalyst is not destroyed or changed during a reaction, so it can be used again.
For some reactions, the presence of electromagnetic radiation, most notably ultra violet, is needed to hasten the breaking of bonds to start the reaction. This is particularly true for reactions involving radicals.
Reaction rates are related to the concentrations of substances involved in reactions, as quantified by the rate law of each reaction. Note that some reactions have rates that are independent of reactant concentrations. These are called zero order reactions....

Answer 2

factors can be anything from catalysts (cat·a·lyst Noun Chemistry, a substance that causes or accelerates a chemical reaction without itself being affected. (most commonly reduces the activation energy)) to temperature and the amount of the reactants (substances used in the reaction) used. Endothermic reactions (ex: ice packs(water + ammonium chloride)) use energy (commonly heat) to produce a reaction therefore are accelerated if they are surrounded by say, boiling water. Exothermic reactions produce energy (heat, light, sound) and therefore are accelerated if they surrounded by something to absorb/transfer the energy say, cold water. A good example of a catalyst would be as simple as salt and water pour salt on ice, it melts ( which is why its put on the roads). Mix salt and water and it boils at less than 212F.

Answer 3

oooh. good one... lemme remember

four factors that affect rate of reaction are:
1) temperature (increases mean speed of particles)
or anything else which will increase mean energy, such as the application of EMR
2) concentration (increases density of particles)
3) reaction order (some reactions occur in linear, some geometric given the shape of the molecules)
4) catalysts and solvents (affect the EM interactions of the particles by lowering activation energy

Answer 4

pressure (for gases), concentration, temperature, surface area and the addition of a catalyst.

Answer 5

temperature, concentration, surface area, pressure (for gases)