It depends on the plant you have. when you buy a new plant it usually has instructions so you would follow. Hope it helps!!!
Physical, because the ice is only changing it's state. It's not changing to a new substance.
I pick but I'm not sure about it though 1and3
Answer: ya this one
Explanation: this is the one
The answer would be .5 mols because you take the total amount of grams, which is 20, and you had up the molar mass of sodium hydroxide, which would be 40. After you have this you would set this up as a stochiometry equation. With 1 mol on top you dived 20/40 to cancel out your grams. This leaves you with .5 mols
