Chmm practice exam - Study guides, Class notes & Summaries

CHMM Final Exam Questions With 100% Correct Answers | Latest Update Graded A+ (2023/2024). Cobalt-60 has a 5 year half life. If the initial activity of a Cobalt-60 source is 20 mCi, what is the activity after 10 years in mCi? a. 5 b. 0 c. 2 d. 10 - Answer a. 5 The exposure rate at a distance of 1 foot from a radioactive source is 20 rnR/hr. What is the exposure rate in mR/hr. at 10 feet? a. 0.1 b. 0.2 c. 0.3 d. 0.4 - Answer b. 0.2 Which of the following is not regulated by EPA as an ...

Which of the following is not regulated by EPA as an environmentally toxic metal? a. arsenic b. lead c. cadmium d. iron - Answer d. iron Which of the following chemicals is heavier than air? Chemical Name Vapor Density a. Methane 0.55 b. Carbon Monoxide 0.97 c. Nitrogen 0.97 d. Propane 1.52 - Answer d. Propane 1.52 Which federal statute regulates both stationary and mobile pollutant sources? a. TSCA b. CAA c. CWA d. SDWA - Answer b. CAA (Clean Air Act) In mg/m3, what is equivalen...

CHMM Exam Practice (CHMM) Questions With 100% Correct Answers | Latest Update Graded A+. When polonium (atomic mass 210 & atomic number 84) emits an alpha particle, which of the following decay products results? a. Bismuth (atomic mass 209 & atomic number 83) b. Lead (atomic mass 206 & atomic number 82) c. Thallium (atomic mass 204 & atomic number 81) d. Mercury (atomic mass 201 & atomic number 80) - Answer b. Lead (atomic mass 206 & atomic number 82) Atomic Mass is: a. the number of pro...

When polonium (atomic mass 210 & atomic number 84) emits an alpha particle, which of the following decay products results? a. Bismuth (atomic mass 209 & atomic number 83) b. Lead (atomic mass 206 & atomic number 82) c. Thallium (atomic mass 204 & atomic number 81) d. Mercury (atomic mass 201 & atomic number 80) - Answer-b. Lead (atomic mass 206 & atomic number 82) Atomic Mass is: a. the number of protons in the nucleus b. the total number of protons & neutrons in the nucleus c. a nuc...

CHMM Practice Exam(CHMM)Questions And Answers 2023