Pls help me very fast please help

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

Which feature indicates that mars resides in the inner region of the solar system

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.