What is used for removing the last traces of water from organic compounds?

Which of the following as a greatest relative atomic mass?

What is a brine solution?

What is the most efficient method to get water with zero degrees hardness?

The hydride gap is related to group ____

Hydrogen is used in an oxyhydrogen flame.

Hydrogen peroxide is __________ in nature.

Is there any difference in heavy water compared with normal Water?