What is the mole fraction of O2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2?


(PLEASE EXPLAIN WHAT YOU DO!)

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To find the mole fraction of O2 in the mixture, we need to first calculate the number of moles of each component in the mixture.

To do this, we use the equation:
Number of moles = mass / molar mass

The molar mass of O2 is 32 g/mol, N2 is 28 g/mol, and H2 is 2 g/mol.

For O2:
Number of moles of O2 = 15.1 g / 32 g/mol

For N2:
Number of moles of N2 = 8.16 g / 28 g/mol

For H2:
Number of moles of H2 = 2.46 g / 2 g/mol

Once we have the number of moles of each component, we can calculate the total moles in the mixture by summing them up:
Total moles = moles of O2 + moles of N2 + moles of H2

Finally, we can calculate the mole fraction of O2 by dividing the moles of O2 by the total moles:
Mole fraction of O2 = moles of O2 / total moles

So, to summarize:
1. Calculate the number of moles of O2, N2, and H2 using the given masses and molar masses.
2. Calculate the total moles of the mixture by summing up the moles of each component.
3. Calculate the mole fraction of O2 by dividing the moles of O2 by the total moles.

To find the mole fraction of O2 in the mixture, we can follow these steps:

1. Calculate the number of moles for each component of the mixture.

The number of moles for each component can be calculated using the formula:

moles = mass / molar mass

The molar mass of O2 is 32 g/mol, N2 is 28 g/mol, and H2 is 2 g/mol.

Moles of O2 = 15.1 g / 32 g/mol = 0.47 mol
Moles of N2 = 8.16 g / 28 g/mol = 0.29 mol
Moles of H2 = 2.46 g / 2 g/mol = 1.23 mol

2. Calculate the total number of moles in the mixture.

Total moles = Moles of O2 + Moles of N2 + Moles of H2
Total moles = 0.47 mol + 0.29 mol + 1.23 mol
Total moles = 2.00 mol

3. Calculate the mole fraction of O2.

Mole fraction of O2 = Moles of O2 / Total moles
Mole fraction of O2 = 0.47 mol / 2.00 mol
Mole fraction of O2 = 0.235

Therefore, the mole fraction of O2 in the mixture is 0.235.

Just using estimates, it look like you have about

0.5 moles of O2
0.3 moles of N2
1.2 moles of H2

So, the fraction of the total represented by O2 is

0.5/2.0 = 25%

Now you can refine that by using the real mole values.