Which is most likely to occur during a chemical reaction?(1 point)
Responses
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.
Mass is conserved.
Mass is conserved.
New atoms are created.
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
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.
Some atoms gain mass after the reaction.
Some atoms gain mass 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
2
2
4
4
8
8
5
4
Which term refers to the type of buying and selling that takes place within a country?
(1 point)
Responses
free trade
free trade
international trade
international trade
productivity
productivity
domestic trade
domestic trade
Why do countries trade goods and services?
(1 point)
Responses
because they want to reduce interdependence
because they want to reduce interdependence
because they do not have all the goods and resources they need
because they do not have all the goods and resources they need
because they want to help other countries grow
because they want to help other countries grow
because they want to protect domestic industries from competition
because they do not have all the goods and resources they need
Which of the following is a way to increase economic development?
(1 point)
Responses
raising taxes
raising taxes
investing in education
investing in education
limiting trade
limiting trade
lowering wages