What is the molarity of 68.3 % by mass of NaNO3 aqueous solution (density of solution = 1.4 g/ml )

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

How does the viscosity of magma change as magma cools?