What is the formula for calculating the energy of a photon?

Smog is the term used to describe the combination of fog and smoke

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.