Answer:
x y
A and A, where x and y are the mass b b numbers, b is the atomic
and A is the chemical symbol of the element
They are different because they have different mass numbers and are similar because they have the same atomic number
Explanation:
Isotopes are atoms that have the same atomic number but different mass numbers due to the difference in neutron number.
Answer:
B is most volatile, A is least volatile
Explanation:
The maximum number of moles of In that could be deposited at the cathode is 0.02 mole.
Given data:
number of ions, n=+3 ions
charge passed through the electrolytes,
Q = 0.06 F.
3 ions = 3 F
3 F ----------------------- 1 mole of the ion
0.06 F ---------------------- ? mole of the ion
no of moles = 0.06 F×1 / 3 F
no of moles =0.02 moles
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Molarity: M = #moles of solute / liters of solution
# moles = mass / molar mass
Molar mass calculation
Barium hydroxide = Ba (OH)2
Atomic masses
Ba = 137.4 g/mol
O=16 g/mol
H=1 g/mol
Molar mass of Ba (OH)2 = 137.4 g/mol + 2*16g/mol + 2*1 g/mol = 171.4 g/mol
# mol = 25.0g/171.4 g/mol = 0.146 mol
For the volume of water use the fact that the density is 1g/ml., so 120 g = 120 ml = 0,120 liters.
M = 0.146mol / 0.120 liters = 1.22 mol/liter