Wich process is involved in deepwater currents

What is the mass of 0.46 mol of mgcl2

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?