What Is the Amount in Moles of Each Elemental Sample?

The amount in moles of each elemental sample can be calculated using the molar mass of the element. The molar mass is the mass of one mole of a substance. To calculate the amount in moles of a sample, divide the mass of the sample by the molar mass of the element. For example, if you have a sample of oxygen that has a mass of 30 grams, you would divide 30 by the molar mass of oxygen, which is 16 grams per mole. This would give you a result of 1.875 moles.

There are Avogadro's number of moles in 1 gram of hydrogen. This number is equal to 6.022 x 1023 atoms.

One mole of helium has a mass of 4.002602 grams. This means that there are approximately 0.25 moles of helium in 1 gram.

One mole of boron contains 6.02 x 10 ^ 23 atoms. One gram of boron contains 6.02 x 10 ^ 23 / (10 ^ 3) moles, or 0.6022 moles.

There are Avogadro's number of moles in 1 gram of nitrogen. This number is equal to 6.02 x 10^23.

One mole of oxygen (O2) gas occupies a volume of 22.4 liters at standard temperature and pressure. In 1 liter of O2 gas at STP, there are 1.429×1025 oxygen molecules. That means that 1 mole of oxygen gas contains 1.429×1025 oxygen molecules. Consequently, 1 gram of oxygen gas contains 1.429×1025/(6.022×1023)=0.239 moles of oxygen molecules.

Fluorine is a chemical element with the symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive, as it reacts with almost all other elements, except for helium and neon. Fluorine forms compounds with the Statue of Liberty and most naturally occurring elements.

In the purest form, fluorine is a pale yellow gas that completely fills any container it is placed in. At room temperature and standard pressure, however, it is a liquid. It has a boiling point of −188.11 °C and a melting point of −219.62 °C.

Fluorine is found in the minerals fluorapatite, fluorite, and cryolite. It is also found in some other minerals and in ground water. The element is extracted from fluorite by electrolysis. Hydrofluoric acid and fluorine gas are the industrial chemicals most commonly produced from fluorite.

Fluorine has an atomic weight of 18.9984. The heavier, more stable isotopes, such as ^F and ^F, are found in the Earth's crust in approximately equal amounts. The very rare ^F has also been found. All fluorine's isotopes are radioactive.

Fluorine's main use is in the production of fluorine-based chemicals, most notably fluorocarbons such as Freon, which are used as refrigerants and aerosol propellants. It is also used as an etchant for metals and glass, and in the manufacture of Teflon and fluoropolymers.

1 gram of fluorine is equal to 1 mole.