Question
A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?
(1 point)
(1 point)
Answers
Bot
The total mass of the products is 28 grams.
TheBestAnwsers
1.)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)
A.)10 grams
B.)15 grams
C.)60 grams
D.)30 grams<<<<
2.)Fe+O2→Fe2O3
What happens to atoms of Fe and O2 during the reaction?(1 point)
A.)They are lost.
B.)They are rearranged.<<<<
C.)They maintain their properties.
D.)They gain mass.
3.)What is most likely to occur during a chemical reaction?(1 point)
A.)New atoms are created.
B.)Mass is conserved.<<<<
C.)The original substance maintains its properties.
D.)Molecules of the original substance are lost.
{4.}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)
A.)Atoms of Na are destroyed during the reaction.
B.)Some atoms gain mass after the reaction.
C.)There are more H atoms after the reaction.
D.)The atoms of the reactants are regrouped during the reaction.<<<<
{5.}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)
A.)8
B.)2
C.)5
D.)4<<<<
A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?(1 point)
A.)10 grams
B.)15 grams
C.)60 grams
D.)30 grams<<<<
2.)Fe+O2→Fe2O3
What happens to atoms of Fe and O2 during the reaction?(1 point)
A.)They are lost.
B.)They are rearranged.<<<<
C.)They maintain their properties.
D.)They gain mass.
3.)What is most likely to occur during a chemical reaction?(1 point)
A.)New atoms are created.
B.)Mass is conserved.<<<<
C.)The original substance maintains its properties.
D.)Molecules of the original substance are lost.
{4.}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)
A.)Atoms of Na are destroyed during the reaction.
B.)Some atoms gain mass after the reaction.
C.)There are more H atoms after the reaction.
D.)The atoms of the reactants are regrouped during the reaction.<<<<
{5.}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)
A.)8
B.)2
C.)5
D.)4<<<<
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