Answer:
1.51 X 10^23 ions
Explanation:
The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]
in one molecule of Al2(SO4)3 there are 5 ions 2 aluminum and 3 sulfate ions
in 2 molecules there are 2X5= 10 ions
in 10 molecules there are 10X5 = 50 ions
molar mass of Al2(SO4)3 = (2 X 26.98) +( 3 X 32.1) + (3 X 4 X 16.0 ) =342.gms = 17.1/342 =0.0500 moles
1 mole =6.02 X 10^23 molecules ( see Avogadros number)
0.0500 moles = 0.0500 X 6.02 X 10^23 molecules =
0.301 X 10^23 molecules = 3.01 X 10^22 molecules
We determined that each molecule of Al2(SO4)3 has 5 ions
so 3.01 X10^22 molecules have 5 X 3.01 X 10^22 ions =
15.05 X 10^22 ions = 1.51 X 10^23 ions
SrSO₄(s) ⇄ Sr²⁺(aq) + SO₄²⁻(aq)
Ksp=[Sr²⁺][SO₄²⁻]
[Sr²⁺]=[SO₄²⁻]
Ksp=[Sr²⁺]²
[Sr²⁺]=√Ksp
[Sr²⁺]=√3.2*10⁻⁷=5.66×10⁻⁴ mol/L
Answer:The bowling ball
The lake
The barbell resting on the floor
Explanation:
I got it right on edge
Answer:
It is the one where the red is attracting the blue and vise versa
Explanation:
Opposite charges attract and Similar charges repel
