Given the following cell diagram: cu(s) | cu2+(0.25 m) || no3- (0.71 m) | no (2.1 atm) | pt(s)
(a) write the balanced redox reaction corresponding to the cell diagram
(b) using standard reduction potentials determine ∆ε° (table 19.1 in openstax your text)
(c) determine ∆ε (ph = 4.2)
(d) determine ∆g°
(e) determine ∆g

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.