If a solution has a hydronium ion concentration of 1x10^-9 m the solution is a) acidic and has a ph of 5 b) basic and has a ph of 9 c) basic and has a ph of 5 d) acidic and has a ph of 9

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space