How many grams Helium in 1 mol?
The answer is 4.002602.
We assume you are converting between **grams Helium** and **mole**.
You can view more details on each measurement unit:
molecular weight of Helium or
mol
The molecular formula for Helium is He.
The SI base unit for **amount of substance** is the mole.
1 grams Helium is equal to 0.24983748071879 mole.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between grams Helium and mole.
Type in your own numbers in the form to convert the units!

1 grams Helium to mol = 0.24984 mol

5 grams Helium to mol = 1.24919 mol

10 grams Helium to mol = 2.49837 mol

20 grams Helium to mol = 4.99675 mol

30 grams Helium to mol = 7.49512 mol

40 grams Helium to mol = 9.9935 mol

50 grams Helium to mol = 12.49187 mol

75 grams Helium to mol = 18.73781 mol

100 grams Helium to mol = 24.98375 mol

You can do the reverse unit conversion from moles Helium to grams, or enter other units to convert below:

In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. We use the most common isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.

Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights.

A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.

Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.

**ConvertUnits.com** provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!