## What is the mole percentage of O2 in a mixture of 7g of N2 and 8g of O2?

the mole percentage of O2 in a mixture of 7g of N2 and 8g of O2 is? (ans:50%)

## What is the mole percent O2 in the mixture?

Mole percentage of O2 is 50.

## How do you find mole percentage?

Mole Percent

- Mole percent is the percentage of the total moles that is of a particular component.
- Mole percent is equal to the mole fraction for the component multiplied by 100: mol % a = Χa × 100.
- The sum of the mole percents for each component in a solution will be equal to 100.

## What is the mole fraction of oxygen in a gas mixture that is 37?

37% of the volume (and therefore 37% of the moles of gas) is oxygen. So: 37 moles of oxygen in 100 moles of solution. The mole fraction = 37/100 = 0.37.

## How many atoms of oxygen are present in 100 grams of caco3?

Answer Expert Verified

100 g of Calcium Carbonate (100,000 mg of Calcium Carbonate) has 3 moles of Oxygen atoms = 3 x 6.022 x 10^23 Oxygen atoms.

## What is meant by molal aqueous solution?

Hint: 1 molal aqueous solution means that 1 mole of a solute is dissolved in 1 Kg of water (the solvent). … It refers to the ratio of the number of moles of solute to the mass of the solvent in kilogram.

## What is mole percent?

Mole percent is the percentage of the total moles that is of a particular component. Mole percent is equal to the mole fraction for the component multiplied by 100: mol % a = Χa × 100.

## What is the mole fraction symbol?

The mole fraction is sometimes denoted by the lowercase Greek letter χ (chi) instead of a Roman x. For mixtures of gases, IUPAC recommends the letter y.

## How do you convert moles to weight?

Multiply the molecular weight by the number of moles for the substance. The molecular weight is the number of grams per mole for the substance and gives the conversion factor for moles to grams for that particular substance. So, one mole of water has a mass of 18.02 grams (1 mol H2O x 18.02 g/mol = 18.02 g).

## Is atomic percent the same as mole percent?

The atomic ratio is a measure of the ratio of atoms of one kind (i) to another kind (j). A closely related concept is the atomic percent (or at. %), which gives the percentage of one kind of atom relative to the total number of atoms. The molecular equivalents of these concepts are the molar fraction, or molar percent.

## How do I calculate ppm?

Parts Per Million (ppm) Concentration Calculations

- Write an equation representing the ppm concentration: ppm = mass solute (mg) ÷ volume solution (L)
- Extract the data from the question: mass solute (NaCl) = 0.0045 g. …
- Convert the mass in grams to a mass in milligrams: mass NaCl = 0.0045 g = 0.0045 g × 1000 mg/g = 4.5 mg.

## What is the mole fraction of oxygen?

The mole fraction of oxygen in exhaled air is 0.147 , and the mole percent is 14.7% .