• 1 mol of beryllium • 1 mol of salt
• 1 mol of water
• 1 mol of hydrogen
Which statement is true about these substances?
They have exactly the same mass.
O They have different numbers of particles.
O They have the same number of atoms.
0 They have different masses.

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.