Given the diagram representing a closed system at constant temperature: Which statement describes this system at equilibrium? 1. The mass of H 2 O( ) equals the mass of H 2 O (g). 2. The volume of H 2 O ( ) equals the volume of H 2 O (g). 3. The number of moles of H2 O ( ) equals the number of moles of H2 O (g). 4. The rate of evaporation of H2 O ( ) equals the rate of condensation of H2 O (g).

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

How does a noncompetitive inhibitor reduce an enzyme’s activity?