Lance threw a ball straight up into the air. The ball's
gravitational potential energy at its peak height was
0.4 joules, and its speed when it hit the ground was
4 meters per second. What was the mass of the ball?

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.