What is the symbol for tin on the periodic table
and how many protons does it have?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Why do cells appear different in distilled water than they do in 10% salt water?

Suppose you mix one mole of sulfuric acid (h2so4) with 1 mole of sodium hydroxide(naoh). why does the ph of the solution remain below 7? ( explain so i can get better understanding! )