If a solution has a [H + 1] concentration of 4.5 x 10 -7 M, is this solution an acid or a base? Explain?

How many molecules are found in 1.32 mol of nacl?

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n

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?