Explain using complete sentences where on the HR diagram you would expect to find a main sequence star based on its physical properties.

The Hertzsprung-Russel Diagram also known as HR diagram is stars' scatter plot showing the relation of luminosity or absolute magnitude vs spectral class or surface temperature. The main sequence stars can be plotted on a HR Diagram as a diagonal band as their physical properties vary a lot.

The mass of these stars ranges from about a tenth of that of the Sun to about 200 times the mass of the Sun. Inside these stars Hydrogen fusion results in Helium. 90% of the stars, including the Sun, in the Universe lies in this category.

Their surface temperature lies in the range of 2500 Kelvin to 40000 Kelvin.

And Giant Stars:

A giant star is a star with a radius much larger than that of our Sun (even hundreds of times bigger). They can be either blue giants or red giants: in the first case, the surface temperature is very high, higher than that of the Sun, while in the second case the surface temperature can be lower than that of the Sun. The same applies to the mass: blue giants are very massive stars, burning quickly their nuclear fuel, while red giants can have small masses (a little bit bigger than that of our Sun).

We can find giant stars in the upper part of the HR diagram, blue giants will be on the upper left corner since they have high luminosity and high temperature, while red giants will be on the upper right corner, having high luminosity but low temperature.  

Explanation:

k2s for potassium sulphide