Question

What is the molar mass of titanium dioxide, $Ti{O_2}$ , the white pigment of white paint, in grams?

Answer 1

Hint : In order to answer the question we should first understand about the molar mass. The mass of a sample of a chemical compound divided by the volume of material in that sample, measured in moles, is the molar mass of that compound in chemistry. In grams, it is the mass of 1 mole of the material, or $6.022 \times {10^{23}}$ particles.

Complete Step By Step Answer:
Let us know about white pigment of white paint.
By far the best white pigment for achieving whiteness and hiding strength in coatings, inks, and plastics is titanium dioxide ( $Ti{O_2}$ ). This is due to its exceptionally high refractive index and lack of absorption of visible light.
$Ti{O_2}$ , is also present in a number of particle sizes ( $d \approx 280$ nm) and shapes (more or less spherical), as well as with a variety of post-treatments.
However, the pigment is costly, particularly when device volume prices are used. And, when using it in coating formulations, there is always a need to build a full-proof strategy to get the best results in terms of cost/performance ratio, scattering quality, and dispersion.
To find a compound's molar mass, multiply each element's molar mass by its subscript in the formula. The atomic weight of an element on the periodic table in $g/mol$ is its molar mass.
So, atomic weight of Titanium $= 47.867\,\,u$
Atomic weight of Oxygen $= \,15.999\,u$
Molar mass of $Ti{O_2}$ $= (1 \times 47.867) + (2 \times 15.999)\, = \,79.865\,g/mol$

Note :
To solve this kind of problem there are some points which we should keep on our finger-tips. To calculate the molar mass we should know the atomic weight or atomic mass of the element. And in most cases the atomic mass is approximately double the atomic number. But for better understanding you should once give a good look at atomic masses.