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?
The total mass of the products can be found by calculating the molar masses of each product and then multiplying them by the stoichiometric coefficients from the balanced equation.
The molar mass of CaCO3 is 40.08 g/mol. Therefore, the number of moles of CaCO3 in 30 grams can be calculated as:
moles of CaCO3 = mass of CaCO3 / molar mass of CaCO3
= 30 g / 40.08 g/mol
= 0.749 moles
Since the balanced equation shows that for every 1 mole of CaCO3, 1 mole of CO2 and 1 mole of CaO are produced, we can conclude that the number of moles of CO2 and CaO produced is also 0.749 moles.
The molar mass of CO2 is 44.01 g/mol. Therefore, the mass of CO2 produced can be calculated as:
mass of CO2 = moles of CO2 * molar mass of CO2
= 0.749 moles * 44.01 g/mol
= 32.9 grams
The molar mass of CaO is 56.08 g/mol. Therefore, the mass of CaO produced can be calculated as:
mass of CaO = moles of CaO * molar mass of CaO
= 0.749 moles * 56.08 g/mol
= 42.0 grams
Therefore, the total mass of the products (CO2 and CaO) is 32.9 grams + 42.0 grams = 74.9 grams.
No use one of the answer choices I gave
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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
15 grams
15 grams
10 grams
10 grams
30 grams
Based on the chemical reaction given, the balanced equation shows that 1 mole of CaCO3 produces 1 mole of CO2 and 1 mole of CaO.
1 mole of CaCO3 has a molar mass of 100.09 g/mol (40.08 g/mol for Ca, 12.01 g/mol for C, and 3(16.00 g/mol) for O).
Therefore, 30 grams of CaCO3 is equal to:
moles of CaCO3 = mass of CaCO3 / molar mass of CaCO3
= 30 g / 100.09 g/mol
= 0.2997 moles
Since the balanced equation states that 1 mole of CaCO3 produces 1 mole of CO2 and 1 mole of CaO, the total moles of the products are also 0.2997 moles each.
The molar mass of CO2 is 44.01 g/mol. Therefore, the mass of CO2 produced can be calculated as:
mass of CO2 = moles of CO2 * molar mass of CO2
= 0.2997 moles * 44.01 g/mol
= 13.192 grams
The molar mass of CaO is 56.08 g/mol. Therefore, the mass of CaO produced can be calculated as:
mass of CaO = moles of CaO * molar mass of CaO
= 0.2997 moles * 56.08 g/mol
= 16.811 grams
Hence, the total mass of the products (CO2 and CaO) is approximately 13.192 grams + 16.811 grams = 29.003 grams.
So about 30 grams
Yes, approximately 30 grams.
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 are rearranged.
They are rearranged.
They gain mass.
They gain mass.
They maintain their properties.
They maintain their properties.
They are lost.
They are lost.
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They are rearranged.
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.
New atoms are created.
New atoms are created.
Mass is conserved.
Mass is conserved.
The original substance maintains its properties.