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Which of the following is the best evidence for a chemical reaction?
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
A reaction in which one element is substituted for another in a compound is called a(n)
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
A material that increases the rate of a chemical reaction by lowering the activation energy is called a(n)
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
The minimum amount of energy required to start a chemical reaction is the
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
In the formula H2SO4, how many atoms are there?
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
You can balance a chemical equation by changing the
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
The number of each kind of atom in the reactants of a chemical reaction is
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
Salt water is an example of
formation of a new substance
a homogeneous mixture.
replacement reaction.
catalyst.
equal to the number of each kind of atom in the products.
activation energy.
7
coefficients.
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