Chemical Formulas And Equations Question Preview (ID: 45390)
Chemical Formulas And Equations.
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The small number wriiten after a symbol is called a:
a) coefficient
b) subscript
c) reactant
d) product
The substances that exist before the reaction begins are called:
a) elements
b) compounds
c) reactants
d) products
The Law of conservation of mass states that:
a) Mass increases in a reaction
b) Mass decreases in a reaction
c) Mass is not lost in a reaction
d)
The large number that is written before a symbol or formula is called a:
a) coefficient
b) subscript
c) reactant
d) product
This occurs naturally and cannot be changed:
a) reactants
b) coefficients
c) products
d) subscripts
In an endothermic reaction, the product will feel:
a) the same
b) colder
c) hotter
d) like a solid
In an exothermic reaction, the product will feel:
a) the same
b) colder
c) hotter
d) like a liquid
2 or more elements that have been combined (NaCl) is called a:
a) Chemical formula
b) Chemical equation
c) Compound
d) Atom
What is written before the arrow in a chemical equation?
a) subscript
b) reactants
c) coefficient
d) products
What is written after the arrow in a chemical equation?
a) subscript
b) reactants
c) coefficient
d) products
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