What is the molecular mass of a gas whose density is
0.76 gram per liter at STP?

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.

Rays from the sun are not considered matter true or false

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?