Relative masses and the mole Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What is the relative formula mass of (NH₄)₂SO₄? (Ar: N 14.0, H 1.0, S 32.1, O 16.0)
- A. 96.1
- B. 114.1
- C. 132.1
- D. 150.1
2. What amount, in mol, is present in 5.85 g of NaCl (Mr 58.5)?
- A. 0.100
- B. 0.0100
- C. 1.00
- D. 10.0
3. 0.0250 mol of a solute is dissolved to make 500 cm³ of solution. What is the concentration in mol dm⁻³?
- A. 0.0125
- B. 0.0250
- C. 12.5
- D. 0.0500
4. How many sodium ions are present in 0.100 mol of NaCl? (L = 6.02 × 10²³ mol⁻¹)
- A. 6.02 × 10²³
- B. 6.02 × 10²²
- C. 1.20 × 10²³
- D. 6.02 × 10²¹
5. Which term is used for the relative mass of an ionic compound such as NaCl?
- A. Relative atomic mass
- B. Relative molecular mass
- C. Relative formula mass
- D. Relative isotopic mass