B) there is an unequal number of electrons and protons
Answer:
I have no idea what you mean.
Explanation:
Yes barium carbonate forms a ppt. it is insoluble in water
The bonds in Barium oxide are ionic bonds (crystalline solid bonds).
Answer:
Moles of air 0.1245 mol.
Explanation:
Given data:
Pressure = 1 atm
Temperature = 293 K
Volume = 3 L
Number of moles = ?
Solution:
PV = nRT
R = general gas constant = 0.0821 dm³ atm . K⁻¹ . mol⁻¹
Now we will put the values in equation
PV = nRT
n = PV / RT
n = 1 atm . 3 L / 0.0821 dm³ atm . K⁻¹ . mol⁻¹ . 293 K
n = 3 / 24.1 dm³ atm. mol⁻¹
n = 0.1245 mol
