First we need to convert grams in moles.
1 mole of calcium has 40 grams of calcium.
72.8 grams are:
72.8/40=1.82 moles
Now we use Avogadro's number to determine number of atoms in 1.82 moles
Number of moles N is:
N=1.82 * 6.02*10^23 = 1.0956 * 10^24 atoms.
Answer:
The cathode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.
I think it would be ionization
Answer:
The answer to your question is 8.21 g of H₂O
Explanation:
Data
mas of water = ?
mass of hydrogen = 4.6 g
mass of oxygen = 7.3 g
Balanced chemical reaction
2H₂ + O₂ ⇒ 2H₂O
Process
1.- Calculate the atomic mass of the reactants
Hydrogen = 4 x 1 = 4 g
Oxygen = 16 x 2 = 32 g
2.- Calculate the limiting reactant
Theoretical yield = H₂/O₂ = 4 / 32 = 0.125
Experimental yield = H₂/ O₂ = 4.6/7.3 = 0.630
From the results, we conclude that the limiting reactant is Oxygen because the experimental yield was higher than the theoretical yield.
3.- Calculate the mass of water
32 g of O₂ ---------------- 36 g of water
7.3 g of O₂ --------------- x
x = (7.3 x 36) / 32
x = 262.8 / 32
x = 8.21 g of H₂O
