Question

find molecular mass of Mgo​

Answer 1

Answer:

The molar mass of magnesium oxide is (24.305 + 15.999) = 40.304 grams/mole.

Answer 2

The molecular mass of MgO is equal to 40 u.

Given:

The chemical formula of Magnesium oxide is MgO.

To Find:

The molecular mass of MgO.

Solution:

→ Magnesium oxide (MgO) is formed by the combination of Magnesium cation (Mg²⁺) and Oxide anion (O²⁻).

→ One mole of Magnesium cation (Mg²⁺) combines with one mole of Oxide anion (O²⁻) to form one mole of Magnesium oxide (MgO).

→ The relative mass of the atoms and molecules is the number of times the atom or molecule is heavier than $\boldsymbol{\frac{1}{12}th }$ of the mass of a single C-12 atom. The unit of relative atomic mass is amu and it's denoted by 'u'.

 $\boldsymbol{\therefore Relative\:atomic\:mass=\frac{Average\:mass\:of\:1\:atom\:of\:th\:substance}{(\frac{1}{12}th\:of\:the\:mass\:of\:one\:C-12\:Carbon\:atom )} }$

→ In one molecule of MgO, one atom of Magnesium (Mg) and one atom of Oxygen (O) are present.

The relative atomic mass of one Magnesium atom (Mg) = 24 u

The relative atomic mass of one Oxygen atom (O) = 16 u

∴ The molecular mass of MgO = 24 + 16 = 30 u

Therefore the molecular mass of MgO is equal to 40 u.

#SPJ2