Bohr's original model stated that electrons were tiny little objects circling the nucleus along fixed orbits, however this is no longer valid as we now know that rather "circling" the nucleus at confined orbits, electrons can seem to be everywhere at once.
Yes it is due to refraction of light in water
Answer:
AgNO3 is soluble dissolves in water to give the Ag+ ion and the NO3- ion
Pb(C2H3O2)2 is soluble in water to give the Pb2+ ion and the CH3COO- ion
KNO3 is soluble in water to give K+ ion and the NO3- ion
(NH4)2S is soluble in water to give the NH4+ ion and the S2- ion
Explanation:
This question requires a knowledge of a few solubility rules
All nitrates are soluble in water
All group I salts are soluble in water
All ammonium salts are soluble in water
All ethanoates are soluble in water except silver ethanoate
It iscalled the "cell wall"
Answer:
H₂SO₄ will be the limiting reagent.
Explanation:
The balanced reaction is:
2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O
The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction).
You can use a simple rule of three as follows: if by stoichiometry 2 moles of Al(OH)₃ reacts with 3 moles of H₂SO₄, how much moles of H₂SO₄ will be needed if 0.4 moles of Al(OH)₃ react?

moles of H₂SO₄= 0.6 moles
But 0.6 moles of H₂SO₄ are not available, 0.40 moles are available. Since you have less moles than you need to react with 0.4 moles of Al(OH)₃, H₂SO₄ will be the limiting reagent.