Question 1Multiple choice
Carbon-12 and carbon-14 are isotopes. How do they differ?
HESI A2 Chemistry
Chemistry covers atoms and isotopes, the periodic table, ionic and covalent bonds, balancing equations, reaction types, moles and molar mass, solutions and pH.
| Atoms | Protons, neutrons, electrons, isotopes, ions |
|---|---|
| Reactions | Balancing and reaction types |
| Numbers | Moles, molarity, dilution and pH |
| Who picks the sections | Your nursing program |
What the questions ask
- Count particles: neutrons = mass number − atomic number.
- Balance an equation by changing coefficients, never subscripts.
- Convert grams to moles with a given molar mass.
- Read pH: below 7 is acidic, and each step is a tenfold change.
Try 3 questions
Question 2Multiple choice
What coefficient belongs in the blank? N₂ + 3H₂ → __NH₃
Question 3Multiple choice
A solution with pH 4 has how many times more hydrogen ions than a solution with pH 6?
Next step
Questions people ask
Is chemistry on every HESI A2?
No. Only some programs require the Chemistry section. Check your program's list before you study it.