In your own words, what does “to flow” mean?

Why is the melting of ice a physical change ?

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule

The molar mass of cu is 63.55 g/mol. the number of grams of cu produced in this reaction is