What is the equilibrium concentration of D? A(aq) + B(s) ⇆ 2C(aq) + D(aq)
K= 2.0×10^(-6)
A( 4.5×10^(-4) )
2C (1.2×10^(-2) )

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device