Which of the following is NOT a piece of equipment used to determine the molar volume of a gas?

• A. Spectrophotometer
• B. Graduated cylinder
• C. Burette
• D. Gas syringe

Answer: (A)

Verified step by step guidance

1. Understand that the molar volume of a gas is typically determined by measuring the volume of a gas sample under known conditions of temperature and pressure.
2. Identify the common laboratory equipment used to measure gas volumes: a graduated cylinder, a burette, and a gas syringe are all designed to measure volumes of liquids or gases accurately.
3. Recognize that a graduated cylinder is a container marked with volume graduations, often used to measure the volume of liquids or gases collected over water.
4. Know that a burette is a precise volumetric instrument used to deliver known volumes of liquid, and can also be adapted to measure gas volumes in some experiments.
5. Understand that a gas syringe is specifically designed to measure the volume of gases directly by the displacement of a piston, making it suitable for molar volume determination, whereas a spectrophotometer measures light absorbance and is unrelated to volume measurement.