A topaz crystal has an interplanar spacing of 1.36 Å. Calculate the wavelength of an X-ray that should be used if θ = 15.0°. You may assume first-order diffraction. (1 Å = 10⁻¹⁰ m)

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Which of the following are correct values for the ideal gas laws constant r