Chemical Reactions
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
In the formula 5CaSO4, this is the number of oxygen atoms.
20
A substance that enters a chemical reaction is called this.
a reactant
A metal and non-metal form this type of compound.
ionic compound
You can balance a chemical equation using this number
Coefficient
A + B = AB
synthesis reaction
This type of reaction occurs when an element displaces another element in a compound, producing a new compound and a new element.
a single displacement reaction
Breaking down the chemical composition. Often times more products than reactants.
a decomposition reaction
In a chemical reaction the substances to the left of the arrow are called this/these?
Reactants
Balance the following chemical reaction:
H2 + NaCl --> HCl + NaH
H2 + NaCl --> HCl + NaH
An expression in which symbols and formulas are used to represent a chemical reaction. EG: H2 + O2 -> H20
A chemical equation
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When balancing an equation, these numbers can not be changed.
a subscript
A solid that forms from a solution during a chemical reaction.
a precipitate
An increase in temperature will usually cause the rate of reaction to ________________.
increase
The reaction 2HgO ---> 2Hg + O is an example of this type of reaction.
decomposition
Give three examples that a chemical change has taken place.
What is temp. change, color change, odor change, formation of a precipitate, formation of a gas?
ammonia + hydrogen chloride -> ammonium chloride
... is an example of this type of reaction.
synthesis reaction
A reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat
Combustion Reaction
Balance the reaction: Na + H2O --> NaOH + H2
2Na + 2H2O --> 2NaOH + H2