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 10 grams 10 grams 15 grams 15 grams 30 grams
The chemical reaction for the decomposition of calcium carbonate is:
CaCO3 -> CaO + CO2
From the equation, we can see that 30 grams of calcium carbonate will decompose into calcium oxide (CaO) and carbon dioxide (CO2). The total mass of the products will be the sum of the masses of calcium oxide and carbon dioxide produced.
The molar mass of CaCO3 is 100.1 g/mol, CaO is 56.08 g/mol, and CO2 is 44.01 g/mol.
First, calculate the molar mass of CaCO3:
30 g CaCO3 * (1 mol / 100.1 g) = 0.2997 mol CaCO3
According to the balanced equation, 1 mol of CaCO3 decomposes into 1 mol of CaO and 1 mol of CO2. Therefore, 0.2997 mol of CaCO3 will produce 0.2997 mol of CaO and 0.2997 mol of CO2.
Calculate the mass of CaO:
0.2997 mol CaO * 56.08 g/mol = 16.8 g CaO
Calculate the mass of CO2:
0.2997 mol CO2 * 44.01 g/mol = 13.2 g CO2
The total mass of the products is the sum of the masses of CaO and CO2:
16.8 g CaO + 13.2 g CO2 = 30 g
Therefore, the total mass of the products is 30 grams.