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28 Cards in this Set
- Front
- Back
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the study of matter and how matter changes
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chemitry
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What type of reation is is FeS + 2 HCI --> FeCl2 + H2S?
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A double replacement reaction
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A chemical equation that showd the same number of each kind of atom on both sides of the equation is dais to be..?
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balanced
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Anything tha has mass and takes up space is considered
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matter
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What happens when chemical bonds break and new bonds form?
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a chemical reaction
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CaCO3 represents a chemical what?
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formula
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The only sure evidence for a chemical reacrion is
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the production of one or more new substances
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a Shorter, easier way to show chemical reactions, using symbols instead of words, is called
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a chemical equation
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the substances listed on the left side of a chemical equation are the
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reactants
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In chemical reactions, what does the priciple of conservation of mass mean?
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matter is not created or destroyed
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Which two processes could e considered opposites?
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a synthesis reaction and a decomposition reaction
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a bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of a
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decomposition reaction
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a chemical reaction that absorbs energy in the form of heat is described as
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endothermic
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the minimum amount of energy that has to be added to strt a reaction is the
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activation energy
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a material used to decrease the rate of a chemical reaction is an
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inhibitor
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A rapid reaction between oxygen and a fuel is known as
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combustion
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In what way can fre be brought under control
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remove oxygen
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what is the best form of fire safety
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fire prevention
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the best way to put out a kitchen fire is too
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cover it or use a home fire extinguisher
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the principle of conservation of mass is true for only what
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reactants in both open and closed systems
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when a chemical reaction takes place in an open system, matter can what
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enter from or escape to the surroundings
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every chemical reaction involves a change in what?
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energy
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chemicals that act as biological catalysts by speeding up reactants in living things are called
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inhibitors
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the home fires that cause the most deaths are caused form what?
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cigarettes
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a chamge that produces a new substance is a ___ change
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chemical
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a gas necessary for combustion to take place is what?
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oxygen
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chemical reactions that absorb energy are said to be what?
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endothermic
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the process of making a more complex compound form simpler substances is called?
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synthesis
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