How can you lower the ph of the vinegar?

boil the vinegar to concentrate it.
mix the vinegar with sugar to thicken it.
add water to the vinegar to dilute it.
freeze the vinegar to change its state.

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

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

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?