Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? a. boiling b. freezing c. filtration d. sorting

If the mass of the products measured 120g what would the mass of the reactants a. 30g b. 60g c. 120g d. 240g

Can someone me with questions 15 to 17 plz.

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.