medium · MCAT chem-phys
A radioactive isotope has a half-life of 10 minutes. If a researcher starts with 80 mg of the isotope, how much remains after 30 minutes?
- 20 mg
- 26.7 mg
- 5 mg
- 10 mg
Sign up free to see the explanation and track your rank →
More MCAT chem-phys practice
- An infrared (IR) spectrum of an unknown organic compound sho… — Which functional group is
- What is the molar mass of Calcium Carbonate (CaCO_3)? (Atomic masses: Ca = 40, C = 12, O =
- How many moles of NH_3 are theoretically produced?
- What is the correct coefficient for O_2?
- What term describes the molecule with internal symmetry despite having chiral centers?
- Which mechanism is occurring?
- Which reactant is the limiting reagent?
- Which term describes the final state where no net heat flow occurs?