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Which of these are a sign that a chemical reaction has occurred?
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
Which statement about endothermic reactions is correct?
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
A substance that is formed in a chemical reaction is called the
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
What happens in a chemical reaction?
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
In an exothermic reaction, energy is transferred from
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
A slow reaction is likely to occur when the reactants have _______ temperatures and _________ surface areas.
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
Which of the following occurs in an endothermic reaction but not in an exothermic reaction?
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
A balanced equation shows the proportions of reactants and products necessary for
energy is absorbed
energy change
reactants to the surroundings
energy is always created in the form of heat
atoms are rearranged
low, small
mass to be conserved
product
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