${}_{95}^{240}\mathrm{Am}$ decays through what emission?

A) Gamma rays
B) Beta particles
C) Alpha particles
D) None of the above

Which formula best characterizes hard-water scum?

A) [CH₃(CH₂) ₁₆CO₂]₂Ca
B) CH₃CH₂CH=CHCH₂CH₂CH₂CO₂H
C) CH₃(CH₂) ₁₆CO₂Na
D) CH₃(CH₂) ₁₆CO₂H
E) CH₃(CH₂) ₁₆SO₃Na

What type of antibiotics stop bacteria from producing folic acid?

What functional groups are represented in the following IR spectrum?