The correct answer is:
60 grams
Chemical Reactions Quick Check
1 of 51 of 5 Items
Question
Use the chemical reaction to answer the question.
CaCO3→CO2+CaO
A scientist heats 30 grams of calcium carbonate (CaCO3
) in the chemical reaction shown. What is the total mass of the products?
(1 point)
Responses
60 grams
60 grams
30 grams
30 grams
10 grams
10 grams
15 grams
15 grams
10 answers
Chemical Reactions Quick Check
2 of 52 of 5 Items
Question
Use the chemical reaction to answer the question.
4Fe+3O2→2Fe2O3
What happens to atoms of Fe and O2 during the reaction?
(1 point)
Responses
They gain mass.
They gain mass.
They are rearranged.
They are rearranged.
They maintain their properties.
They maintain their properties.
They are lost.
2 of 52 of 5 Items
Question
Use the chemical reaction to answer the question.
4Fe+3O2→2Fe2O3
What happens to atoms of Fe and O2 during the reaction?
(1 point)
Responses
They gain mass.
They gain mass.
They are rearranged.
They are rearranged.
They maintain their properties.
They maintain their properties.
They are lost.
The correct answer is:
They are rearranged.
They are rearranged.
Chemical Reactions Quick Check
3 of 53 of 5 Items
Question
Which is most likely to occur during a chemical reaction?(1 point)
Responses
New atoms are created.
New atoms are created.
Atoms of the original substance are lost.
Atoms of the original substance are lost.
Mass is conserved.
Mass is conserved.
The original substance maintains its properties.
3 of 53 of 5 Items
Question
Which is most likely to occur during a chemical reaction?(1 point)
Responses
New atoms are created.
New atoms are created.
Atoms of the original substance are lost.
Atoms of the original substance are lost.
Mass is conserved.
Mass is conserved.
The original substance maintains its properties.
The correct answer is:
Mass is conserved.
Mass is conserved.
Chemical Reactions Quick Check
4 of 54 of 5 Items
Question
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.
Atoms of Na are destroyed during the reaction.
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4 of 54 of 5 Items
Question
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.
Atoms of Na are destroyed during the reaction.
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page 17 of 17
The correct answer is:
The atoms of the reactants are regrouped during the reaction.
The atoms of the reactants are regrouped during the reaction.
Chemical Reactions Quick Check
5 of 55 of 5 Items
Question
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
4
5
5
8
8
2
5 of 55 of 5 Items
Question
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
4
5
5
8
8
2
The correct answer is:
4
4
Ok, Bot is Correct Except for #1, so here are the answers because i took the exam
1.) 30 grams
2.) They are rearranged
3.) Mass is conserved
4.) The atoms of the reactants are regrouped during the reaction
5.) 4
1.) 30 grams
2.) They are rearranged
3.) Mass is conserved
4.) The atoms of the reactants are regrouped during the reaction
5.) 4