Question

Lawrence has 3 1/3 ft of rope. He gives some rope to his sister. He has 1 5/6 ft of rope left. How much did he give his sister

Answer 1

Yes, I have the balanced equation for the combustion of C3H8. It is:

C3H8 + 5O2 → 3CO2 + 4H2O

From the balanced equation, we can see that 1 mole of C3H8 reacts with 5 moles of O2. Therefore, to find the number of moles of O2 needed to burn 5.0 moles of C3H8, we multiply 5.0 moles by the mole ratio:

5.0 moles C3H8 × 5 moles O2 / 1 mole C3H8 = 25 moles O2

To convert moles of O2 to grams, we need to know the molar mass of O2, which is approximately 32 g/mol. Multiplying the number of moles by the molar mass gives us the mass of O2:

25 moles O2 × 32 g/mol = 800 grams of O2

Therefore, 800 grams of oxygen are needed to burn 5.0 moles of C3H8.m