0,35 kmol/m³ = 0,35 mol/dm³ = 0,35 mol/L
175 mL = 0,175 L
*-*-*-*-*-*-*-*-*-*-*-*
C = n/V
n = 0,35×0,175
n = 0,06125 mol
mCa(NO₃)₂: 40+(14×2)+(16×6) = 164 g/mol
1 mol --------- 164g
0,06125 ---- X
X = 10,045g
To prepare 175 mL of 0,35M solution, add 10,045g of calcium nitrate and add water to a volume of 175ml.
It is a chemical reaction of the metal surface with the oxygen that causes some of the metal to corrode and form the oxidation or better known as metal oxide on the surface.
1. Magnets attract objects of iron, cobalt and nickel
2. Force of attraction of a magnet is greater at is poles than in the middle
Answer:
oxygen ion O2-
Explanation:
because it has 8 protons and gave gained 2 electron so O2-.