What is the pH and pOH of a 2.34 x 10^-5 NaOH solution?

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?