question Which technique measures the rate of a chemical reaction by monitoring changes in absorbance or fluorescence over time

The Lewis structure for a nitrogen trifluoride (NF3) molecule shows:

A. One single bond and two double bonds
B. One single bond and two triple bonds
C. Three single bonds
D. One double bond and two single bonds

Who discovered the neutron?

A. James Chadwick
B. Ernest Rutherford
C. Marie Curie
D. J.J. Thomson

What is the standard state condition for thermodynamic calculations?

A. 1 atm pressure and 0°C
B. 1 atm pressure and 25°C
C. 0 atm pressure and 0 K
D. 0 atm pressure and 100°C

The unit of heat capacity is:

A. Joule per Kelvin (J/K)
B. Calorie per Kelvin (cal/K)
C. Watt per Kelvin (W/K)
D. Coulomb per Kelvin (C/K)

Which technique involves the study of the interaction between a magnetic field and radiofrequency radiation to analyze molecular structures?

A. Nuclear magnetic resonance (NMR)
B. Electron spin resonance (ESR)
C. Mass spectrometry (MS)
D. Infrared spectroscopy

The heat capacity ratio (γ) is also known as the:

A. Adiabatic index
B. Isentropic exponent
C. Enthalpy ratio
D. Entropy index

Which type of isomerism occurs in compounds with the same molecular formula but different spatial arrangements around double bonds?

A. Geometric isomerism
B. Structural isomerism
C. Stereoisomerism
D. Optical isomerism

What is the term for a bond formed by the attraction between two atoms with identical electronegativities?

A. Nonpolar covalent
B. Polar covalent
C. Ionic
D. Metallic

The process of beta decay involves the emission of a:

A. Electron
B. Proton
C. Neutron
D. Positron

What is the shape of a molecule with a trigonal pyramidal electron domain geometry?

A. Trigonal pyramidal
B. Linear
C. Tetrahedral
D. Bent