If the actual yield is 1.5g of "al203" what is the percent yield with soultion

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

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?

Which of the following molecules is polar? c3h7oh c2h5cooh