HESI A2 Exam Prep 2026

Real HESI A2 Questions.
Real Accuracy. Real Results.

Practice with exam-accurate HESI A2 questions that match the real test in format, difficulty, and logic. Trusted by students accepted into nursing programs across the United States.

8
Exam Sections
75%
Typical Pass Score
~5hr
Total Test Time
95%
Our Pass Rate

About Stoichiometry & Mole Concept

The molar mass of sulfuric acid (H₂SO₄) is 98 g/mol, calculated by summing atomic masses of hydrogen, sulfur, and oxygen.

Back to topics

Stoichiometry & Mole Concept HESI A2 Practice Questions

Free Stoichiometry & Mole Concept practice questions for the HESI A2 exam with detailed rationales.

Question 1 of 2

What is the molar mass of H₂SO₄ (sulfuric acid)?
150 g/mol
98 g/mol
78 g/mol
) 112 g/mol