Answer:
22.4L
Explanation:
The following data were obtained from the question:
P = 1atm
T = 273K
n = 1mole
R = 0.08206 L∙atm/mol∙K
V =?
PV = nRT
V = nRT/P
V = (1 x 0.08206 x 273)/1
V = 22.4L
It is an example of physical change. The molecules are not changing, so it is not chemical, and a physical property is something that a physical thing has.
The answer is (3) Cu2O. Copper (I) has an oxidation state of +1 (that's what the "I" indicates). You can also think of this as copper (I) having a charge of +1. Oxygen has an oxidation state of -2 (that's just a rule you have to know), and you can think of it as oxygen having a charge of -2. You need oxidation numbers in a neutral compound to add up to 0 (or charges in a neutral compond to add up to 0), so you need two Cu to balance the O, which is Cu2O.
I just took that quiz , it’s A