Which statement matches a subatomic particle with its charge?
(1) a neutron has a negative charge.
(2) a proton has a negative charge.
(3) a neutron has no charge.
(4) a proton has no charge.

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

How manyatoms of mercury are in 1.4214e+1 ml sample

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?