a sample of ethane has the same mass as 10million mulecules of methane. how many moles of CO2 are left?
Your question makes no sense.
To determine the number of moles of CO2 left, we first need to find the number of moles of ethane present. Then, we can use stoichiometry to calculate the number of moles of CO2 produced from the given amount of ethane. Let's break down the steps:
1. Calculate the number of moles of ethane:
To find the number of moles, we need to know the molar mass of ethane (C2H6). The molar mass of carbon (C) is approximately 12.01 g/mol, and the molar mass of hydrogen (H) is approximately 1.008 g/mol.
The molar mass of ethane (C2H6) can be calculated as follows:
Molar Mass of Ethane = (2 × Molar Mass of Carbon) + (6 × Molar Mass of Hydrogen)
Molar Mass of Ethane = (2 × 12.01 g/mol) + (6 × 1.008 g/mol)
Molar Mass of Ethane ≈ 30.07 g/mol
Since the sample of ethane has the same mass as 10 million molecules of methane, we can calculate the mass of ethane:
Mass of Ethane = (Number of Molecules of Methane × Molar Mass of Methane) / Avogadro's Number
The molar mass of methane (CH4) is approximately 16.04 g/mol.
Mass of Ethane = (10,000,000 × 16.04 g/mol) / 6.022 × 10^23 molecules/mol
2. Calculate the number of moles of ethane:
Number of Moles of Ethane = Mass of Ethane / Molar Mass of Ethane
3. Use stoichiometry to find the number of moles of CO2 produced from ethane:
The balanced equation for the complete combustion of ethane is as follows:
C2H6 + 7/2 O2 → 2 CO2 + 3 H2O
From the balanced equation, we can see that for every 2 moles of CO2 produced, 1 mole of ethane is consumed.
Number of Moles of CO2 = (Number of Moles of Ethane) × (2 Moles of CO2 / 1 Mole of Ethane)
By following these steps, you can calculate the number of moles of CO2 left based on the given information.