Question

What is the molar mass of titanium dioxide, $Ti{{O}_{2}}$, the white pigment of white paint, in grams?

Answer 1

Hint: Molecular mass or molar mass is the sum of the atomic masses of all atoms in a molecule. Therefore, we can calculate the molecular mass if we know the molecular formula which can be given and can also be calculated.

Complete step by step answer:
For calculating the molecular mass of a compound or a molecule first we need to know the molecular formula of that compound here in the question we were provided the molecular formula of titanium dioxide that is $Ti{{O}_{2}}$.
Titanium is the ninth most commonly occurring metal in the earth’s crust which combines with oxygen to form different oxides and titanium dioxide is one of the natural occurring oxide of titanium.
Titanium dioxide is a white pigment of white paint common in sunscreen.
To calculate the molecular mass first we need to know the atomic mass of all the atoms here we have titanium and oxygen
We know the atomic mass of titanium is $48$ gm
and, atomic mass of oxygen is $16$ gm.
Now multiply the atomic mass by the number of atoms of each atom and add to make the molecule and hence the molecular formula, as show below for the given question
$\begin{align}
  & Ti+2(O) \\
 & 48+2(16) \\
 & 48+32 \\
 & 80 \\
\end{align}$
Therefore, the molecular mass of titanium dioxide is $80$ gm.

Note: The molecular formula, atomic masses of each atom and other required things can be given and be calculated. Also, it is advised to know the atomic mass of most of the elements and most importantly can also of those which are most common.