How was the charge distributed in the plum pudding model of the atom

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?