Radium-221 has a half-life of 30 s. how long will it take for 95% of a sample to decay

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

Chemical engineering who specializes in negotiating for large purchases and instructing customers in use of the products are