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Glossary of Bob Jones Science 9th Chapter 9 Section B

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What is the law of conservation of matter?
Matter is neither created nor destroyed.
In a chemical formula, the substances on the left side are...
reactants.
In a chemical formula, the substances on the right side are...
products.
The number in front of the formula that shows how many molecules of reactants are needed to balance the formula is...
coefficient
Never change a ________ to balance a reaction, but instead change the __________.
formula
coefficient
This reaction combines two or more substances into one single product...
combination reaction or synthesis
Reactions that take apart one substance resulting in more than one product such as the processing of crude oil...
decomposition reaction.
This reaction replaces one element with another. It has a compound and an element as a reactant...
single-replacement reaction
In this reaction two ionic reactants switch cations and anions. It usually takes place in aqueous (water) solutions...
Double replacement
A solid that settle out of a solution during a reaction...
precipitate
Reactions that give off heat such as the reaction that powers a car...
exothermic
Reactions that absorb heat...
endothermic

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