How could an alpha particle strike the phosphor screen on the same side of the foil as the alpha particle source?

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)

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

Which statement is best described as a atom