Which is most likely to occur during a chemical reaction?(1 point)
Responses
Mass is conserved.
Mass is conserved.
Atoms of the original substance are lost.
Atoms of the original substance are lost.
The original substance maintains its properties.
The original substance maintains its properties.
New atoms are created.
Mass is conserved.
Use the chemical reaction to answer the question.
NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2
A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown. Which statement about the reaction is correct?
(1 point)
Responses
Some atoms gain mass after the reaction.
Some atoms gain mass after the reaction.
The atoms of the reactants are regrouped during the reaction.
The atoms of the reactants are regrouped during the reaction.
There are more H atoms after the reaction.
There are more H atoms after the reaction.
Atoms of Na are destroyed during the reaction.
The atoms of the reactants are regrouped during the reaction.
Use the chemical reaction to answer the question.
2H2+O2→2H2O
There are four atoms of hydrogen (H) before the reaction. How many atoms of hydrogen are present after the reaction?
(1 point)
Responses
4
2
5
8