Asolution of so2 in water contains 0.00023 g of so2 per liter of solution. what is the concentration of so2 in ppm? in ppb?

Nonmetal halogen family atmoic mass 35

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

What is another way to determine mass times acceleration?