How many atoms of carbon are in 2.50 moles of CO2?

Calculate the wavelength of light emitted from a mol of photons as they transition from in the hydrogen atom.

Identify the color that has a wavelength of 480 nm.

Choose the pure substance from the list below.

How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 616 kJ of energy?

Which of the following elements is a transition metal?

How many xenon atoms are contained in 2.36 moles of xenon?

Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength of 1.33 × 10-35 m.

Choose the ground state electron configuration for Cr3⁺.

An atom of 17O contains ________ protons.