Determine the total net force and the direction of movement for each situation

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Pls ill give u brainliest which of the following is true about science? 1. political conditions are unable to influence it. 2. economic concerns may prevent it from solving problems.

Rank the four gases (air, exhaled air, gas produced from from decomposition of h2o2, gas from decomposition of nahco3) in order of increasing concentration of co2