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It lowers the activation energy of a reaction and increases reaction rate.
A number placed in front of an element symbol or chemical formula in an equation
A new substance made from a chemical reaction
A starting substance in a chemical reaction
A substance that slows or stops a chemical reaction
A state in which forward and reverse reactants proceeds at equal rate
Which substance is the precipitate in the following reaction?Â
SiCl4 (l) + 2H20 (l) --> SiO2 (s) + 4 HCl (aq)
In the chemical reactions leading to food spoilage, which role do food preservatives play?
Which of these processes is endothermic?
Magnesium reacts with oxygen and forms magnesium oxide is an example of a ___ reaction.
Hydrogen peroxide breaks down to form water and oxygen is an example of a _____ reaction.
All chemical reactions result in the formation of
Which of the following represents a balanced equation?Â
Which is a more reliable indicator that a chemical reaction has occurred?
Which activity requires the least activation energy?
In a reaction that has one reactant and two products, the
A single-replacement reaction has
The ____ determines the mass of the products of a chemical reaction.
The number of products is always less than the number of reactants in aÂ
The difference between the energy required to break bonds and the energy released when bonds are formed determines whether a reaction is
Which action does NOT occur when water is broken down to for hydrogen and oxygen?
