Chemical Reactions

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An example of chemical change is

The combustion of butane gas produces carbon dioxide and water vapor. The products of the reaction are:

If the mass of reactants = 30 g, then the mass of products is equal to

During a chemical reaction,

An example of physical change is

The combustion of butane gas is

During a chemical change,

Magnesium reacts with oxygen gas in air to produce magnesium oxide. The word equatin of the reaction is written as