4. A cube has a length of 6 cm on one side. What would be the cube's densit if it has a mass of 4,169 grams? What substance is it?
I really need help

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

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If a solution contains 3 moles/liter of sodium chloride (nacl, made of sodium ions and chloride ions), what is the osmolarity of this solution