calculate the number of moles 0.5 grams of k2co3. how many potassium ion and carbonate ion are present in it​

Compare and contrast physical changes with chemical changes.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3