Uh help? What science law explains why there should always be the same type of elements on the reactant side as there are on the product side? What does this law state? (HINT: Answer both of these questions. A: The Law of states that .)

What is the molecular formula of a hydrocarbon with m+ = 166? (write the formula with no subscripts, e.g. c4h10.) what is the sum of rings and double bonds in this compound?

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

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?