››Percent composition by element
Element Symbol Atomic Mass # of Atoms Mass Percent
BerylliumBe9.0121821trăng tròn.945%

››Calculate the molecular weightof a chemical compound 0) location="/molarmass/" + urlencode(this.q.value); else alert("Please enter a chemical formula or name of a substance."); return false;">Enter a chemical formula: 0) location="/molarmass/" + urlencode(this.khung.q.value); else alert("Please enter a chemical formula or name of a substance."); return false;">

Browse the menu ofcomtháng chemical compounds.

Bạn đang xem: Molecular Weight Of Be(Oh)2

››More information onmolar mass & molecular weight

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.

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.

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.

Xem thêm: Hiệp Ước Thân Thiện Và Hợp Tác Đông Nam Á, Nghĩa Của Từ Trong Tiếng Việt

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

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 & multiplying by 100.

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.

Xem thêm: Godaddy Hosting Review 2021

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

Convert ·Dates ·Salary ·Chemistry ·Forum ·Search ·Privacy ·Bibliography ·Contact© 2021