Which is the slowest chemical reaction? Digesting food , boiling an egg, tarnishing of silver, or melting of a glacier

The isotonic saline solution described in part a is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. based on this information, what can be said about these two solutions?

What’s the percent by mass of carbon in c10h14n2

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots