IPC A Fall Semester Exam 2023-24

Students conduct a lab in which they neutralize an acid. Which of the following is the last thing students should do before leaving the lab area?

• disassemble the equipment

• wash their hands

• record their observations

• clean the lab tables

During an experiment, a reagent bottle is accidentally spilled on the laboratory floor. What is the first step a student should take?

• Clean it up with paper towels

• Cover the spill with an absorptive material, such as kitty litter

• Alert the teacher

• Evacuate the lab

An experiment is being conducted using a strong acid. Which of the following pieces of safety equipment should be used or be available? Choose 3 answers!

• Safety Showers

• Eyewash fountains

• Safety Goggles

• Fire Extinguisher

Students are comparing the NFPA ratings on three different chemicals to figure out which chemical is most reactive and dangerous to handle. The following chart is a summary of their results. Which chemical is the most reactive and dangerous to handle and why?

• Chemical A because it is an acid and the rating of 2 is the most dangerous rating.

• Chemical B because it has unusual reactions with water and the lowest ratings.

• Chemical C because it is an alkaline material and the highest ratings around 4.

• All of the chemicals are very reactive and dangerous to handle.

How many protons and neutrons are in one atom of this isotope of Silicon 30?

• 14 protons and 14 neutrons

• 14 protons and 16 neutrons

• 16 protons and 14 neutrons

• 16 protons and 16 neutrons

In a sample of elemental bromine, 55% of the atoms are Br-79, and the remainder are Br-81. If this sample is typical of naturally occurring bromine, what is the average atomic mass of bromine?

• 79.9 amu

• 35.0 amu

• 45.0 amu

• 80.0 amu

Which of the following are true of the radioactive isotope C-14 and its stable form C-12? Select TWO correct answers.

• They have the same number of protons.

• They have the same number of neutrons.

• C-14 has two more neutrons than C-12.

• C-14 has two more protons than C-12

Which of the following equations represents alpha decay?

• A

• B

• C

• D

Identify the nuclide that completes and balances the nuclear reaction:

• A

• B

• C

• D

What is the average atomic mass of neon?

• 10.50 amu

• 20.19 amu

• 21.00 amu

• 2018.77 amu