How many formula units of sodium nitrate will react with 20.0 g calcium carbonate to produce sodium carbonate and calcium nitrate

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

Explain why scientists use shared characteristics to make cladograms.

What’s the scientific notation for the number 6,840,000,000