How do the total mass of the reactants compare to the total mass of the products in the balanced chemical reaction below?
Use the periodic table. Round mass to the nearest whole number.
1 C3H8 + 5 O2 = 3 CO2 + 4H2O
The mass of the reactants adds up to 13 grams and the products add up to 6 grams.
The mass of the reactants adds up to 29 grams and the products add up to 29 grams.
The mass of the reactants adds up to 76 grams and the products add up to 62 grams.
The mass of the reactants adds up to 204 grams and the products add up to 204 grams.
The correct answer is: The mass of the reactants adds up to 76 grams and the products add up to 62 grams.
To determine how the total mass of the reactants compares to the total mass of the products in the balanced chemical reaction, we need to calculate the total mass of both the reactants and the products.
Reactants:
1 C3H8 = 3 carbons (C) + 8 hydrogens (H)
Using the atomic mass on the periodic table, we find that:
3 carbons (C) = 3 × 12 g/mol = 36 g/mol
8 hydrogens (H) = 8 × 1 g/mol = 8 g/mol
Total mass of C3H8 = 36 g/mol + 8 g/mol = 44 g/mol
Now, let's calculate the total mass of the reactants:
1 C3H8 = 44 g/mol
Products:
3 CO2 = 3 carbons (C) + 6 oxygens (O)
4 H2O = 8 hydrogens (H) + 4 oxygens (O)
Using the atomic mass on the periodic table, we find that:
3 carbons (C) = 3 × 12 g/mol = 36 g/mol
6 oxygens (O) = 6 × 16 g/mol = 96 g/mol
8 hydrogens (H) = 8 × 1 g/mol = 8 g/mol
4 oxygens (O) = 4 × 16 g/mol = 64 g/mol
Total mass of CO2 = 36 g/mol + 96 g/mol = 132 g/mol
Total mass of H2O = 8 g/mol + 64 g/mol = 72 g/mol
Now, let's calculate the total mass of the products:
3 CO2 = 3 × 132 g/mol = 396 g/mol
4 H2O = 4 × 72 g/mol = 288 g/mol
The total mass of the reactants is 44 grams, while the total mass of the products is 396 grams. Therefore, the correct answer is:
The mass of the reactants adds up to 44 grams and the products add up to 396 grams.