What is meant by molecular formula?
What is meant by molecular formula?
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule. The molecular formula for a compound can be the same as or a multiple of the compound’s empirical formula.
What’s the difference between a molecular formula and an empirical formula?
The empirical formula simply states the ratios of the elements that make up the molecule, while molecular formulas specify the amounts of each element exactly, not just giving the ratio.
What is the formula for relative molecular mass?
The relative molecular mass/relative formula mass is defined as the sum of all the individual atomic masses of ALL the atoms in the formula (Mr). e.g. for ionic compounds e.g. NaCl = 23 + 35.5 58.5) or molecular mass for covalent elements or compounds …
What is the SI unit of relative molecular mass?
The molar mass of an atom or nuclide X is M(X) = Ar(X) × 10-3 kg/mol = Ar(X) kg/kmol = Ar(X) g/mol, where Ar(X) is the relative atomic mass of X (see Sec. 8.4). Quantity symbol: cB. SI unit: mole per cubic meter (mol/m3).
Is ar the same as Mr?
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Is AR and MR the same in chemistry?
(6) For molecules Mr is the relative molecular mass or molecular weight; for atoms Mr is the relative atomic mass or atomic weight and the symbol Ar may be used.
What is the unit for MR?
Relative atomic mass is a ratio and has no unit . The relative atomic mass of each element is given in the Periodic Table.
What is AR in moles?
The Ar is the relative atomic mass. relative atomic mass.
What is the AR value for hydrogen?
1
How many grams of magnesium are in 1 mole?
Each atom has a different size and therefore a different mass. The relative masses of each element can be found on the periodic table. For example, one atom of magnesium weighs 24.31 amu (atomic mass units). However, one mole of magnesium weighs 24.31 g.
What is the mass of one mole of carbon?
12.01g/mol
What is the formula of magnesium sulphate?
MgSO₄