Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? show your work. (4 points) 2na + 2h2o > 2naoh + h2 2na + 2h2o > 2naoh + h2 48.7 g ? molecules 2 mol na= 1 mol h2 1 mol na= 23g na 1 mol h2= 6.02x1023 molecules (48.7g na/1)x(1 mol na/23g na)x(1 mol h2/2mol na)x(6.02x1023/1 mol h2) (48.7)(6.02x1023)/(23)(2)= 293.174x1023 molecules can someone tell me what i did wrong?

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.

Which best describes how johannes kepler developed his laws of planetary motion

Which type of fossil does this image depict?