What is the pH of a solution that has a H+ concentration equal to 1.7 x 10-5 M?
5.20
0.22
10.20
4.77

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.