Which of the following is the most reactive? 1. potassium 2. lithium 3. sodium 4. rubidium

Which of the following are correct values for the ideal gas laws constant r

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %