In theory yes, but we can't get one with enough qbits (you would need more qbits than your molecule because you need to encode positions and interactions of ele

In theory yes, but we can't get one with enough qbits (you would need more qbits than your molecule because you need to encode positions and interactions of electrons at the very least), enough configurability (current q-computers are somewhat limited to which qbit can interact with which through which mean) and that is able to keep decoherence away (which limits how much it can scale). It seems that we are really hitting a wall every time we want to scale them to a useful size and keep the number of possible interactions between qbits high and noise/decoherence level low. So for now we don't have the technology (if ever), it is not just a problem of "just scaling by adding more qbits" we need a new approach.