what are the three requirements for a chemical reaction to occur?
432830
['Reactant Concentrations. Raising the concentrations of reactants makes the reaction happen at a faster rate. ... ', 'Surface Area. ... ', 'Pressure. ... ', 'Temperature. ... ', 'Presence or Absence of a Catalyst. ... ', 'Nature of the Reactants.']
218754
['The equation must represent known facts.', 'The equation must contain the correct formulas for the reactants and products.', 'The law of conservation of mass must be satisfied.']
425155
['Ignition: Fuel, oxygen and heat join together in a sustained chemical reaction. ... ', 'Growth: With the initial flame as a heat source, additional fuel ignites. ... ', 'Fully developed: Fire has spread over much if not all the available fuel; temperatures reach their peak, resulting in heat damage.']
1438865
['Precipitation, or double-replacement reaction.', 'Acid-base, or neutralization reaction.', 'Oxidation-Reduction (Redox) Reactions.', 'Combustion Reaction.', 'Synthesis Reactions.', 'Decomposition Reactions.', 'Single Replacement Reactions.']
1253956
['A change of color occurs during the reaction.', 'A gas is produced during the reaction.', 'A solid product called a precipitate is produced in the reaction.', 'A transfer of energy occurs as a result of the reaction.']
99369
Chemical reactions. Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
530244
The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
558031
Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.
514714
Chemical reaction. A process during which chemical bonds between atoms are broken and new ones are formed. Producing one or more different substances. reactant. the starting materials in a chemical reaction.
531745
['Chemical Formula: C.', 'Oxidation: Combines with oxygen to produce carbon dioxide (CO2 ) and carbon monoxide (CO)', 'Reactivity: Carbon does not dissolve in, or react with, water or acids.', 'Chains of Atoms: Carbon has the ability to make long strings, or chains, of atoms.']
569714
['Change in Temperature.', 'Change in Color.', 'Noticeable Odor (after reaction has begun)', 'Formation of a Precipitate.', 'Formation of Bubbles.']
100699
Chemical reaction is the process in which one reactant breaks or two or more reactants reacts to form one or more products but chemical equation represents the reaction which had occured by symbols.
749602
['Can be isolated as well as prepared in laboratory.', 'Comprise almost 90% of all known compounds.', 'Mostly built up of only three elements- carbon, hydrogen and oxygen. ... ', 'Possess complex structures and high molecular weights.']
594293
A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
1083725
['Synthesis of ammonia.', 'Combustion of hydrogen / Electrolysis of water.', 'Combustion of methane (hydrocarbons)', 'Photosynthesis.', 'Synthesis of sulfuric acid.', 'Equilibrium of carbonic acid and carbon dioxide gas.', 'Biological formation of calcium carbonate.', 'Rusting of iron.']
1280920
['Thermal decomposition reactions;', 'Elctrolytic decomposition reactions;', 'Photo decomposition reactions.']
289995
Answer and Explanation: During all chemical reactions, mass, energy and charge are conserved. The three basic conservation laws are: conservation of mass.