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## What is the mole percent O2 in the mixture of 7g?

the mole percentage of O_{2} in a mixture of 7g of N_{2} and 8g of O_{2} is? (ans:**50**%)

## What is the mole fraction of O2 in the mixture?

Similarly, the mole fractions of O2 and Ar are **0.21 and 0.009**, respectively. Using Equation 10.6. 11, we therefore know that the partial pressure of N_{2} is 0.78 atm (assuming an atmospheric pressure of exactly 760 mmHg) and, similarly, the partial pressures of O2 and Ar are 0.21 and 0.009 atm, respectively.

## What is the mole percentage of mixture?

Mole percent is **the percentage that the moles of a particular component are of the total moles that are in a mixture**. The sum of the mole fractions for each component in a solution is equal to 1.

## How many moles of Na+ ions are in 20 ml of 0.4 M na3po4?

So we have **0.024 moles** of ions.

## What mass of magnesium nitrate will have 0.25 moles of oxygen atoms?

So,moles of magnesium phosphate that contains 0.25 mole of oxygen atom= 0.25/8=0.03125 mol=**3.1*10^-2 mol**.

## What is a mole fraction?

Mole fraction represents **the number of molecules of a particular component in a mixture divided by the total number of moles in the given mixture**. It’s a way of expressing the concentration of a solution. Therefore, the sum of mole fraction of all the components is always equal to one.

## How do you divide a fractional component of each mole value?

In order to be able to calculate the mole fraction of each component in the mixture, you will have to convert the masses given to you to moles. So, to get the mole fraction of a component i of the mixture, all you have to do is **divide the number of moles of that component by the total number of moles present.**