Which of the following instruments is used to measure the concentration of a gas in a sample?
A. Gas chromatograph
B. Mass spectrometer
C. Infrared spectrometer
D. X-ray diffractometer
Answer:A
Which of the following instruments is used to measure the concentration of a gas in a sample?
A. Gas chromatograph B. Mass spectrometer C. Infrared spectrometer D. X-ray diffractometer
Explanation: A gas chromatograph is an instrument that separates and analyzes the components of a gas mixture. It is commonly used to measure the concentration of gases in industrial processes and environmental monitoring.