Answer:
[Ba^2+]= 0.400M
[OH-]= 0.800M
Explanation:
Step 1: Data given
Molarity ofBa(OH)2 = 0.400 M
Ba(OH)2 is a strong electrolyte, so 100 % dissociation
Step 2: The equation
Ba(OH)2 → Ba^2+ + 2OH-
In 1 mol Ba(OH)2 we have 1 mol Ba^2+ and 2 moles OH-
Step 3: Calculate the concentration
[Ba^2+]= 1* 0.400 M = 0.400M
[OH-]= 2*0.400 M = 0.800M
Answer:
nuetrons
Explanation:
some helium atoms just a little thick and packing extra neutrons
Answer:
0.156 moles of Fe₂O₃
Explanation:
To determine the moles, we must divide mass (g) to the molar mass of the compound.
Fe₂O₃ → 159.7 g/mol (molar mass)
We need the mass of compound in g, so let's do the conversion:
2500 cg . 1g / 100cg = 25 g
Moles = mass / molar mass → 25 g / 159.7 g/mol = 0.156 moles of Fe₂O₃
Answer:
<h2>1.23 moles</h2>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>1.23 moles</h3>
Hope this helps you