I think the correct answer from the choices listed above is the first option. The fact that the 2s orbital would fill with electrons before the 2p orbital would accept electrons is an application of the Afbau principle. It <span> states that, hypothetically, electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels.</span>
A possible answer is generalizations
Answer:
FeCl₃ is present in excess.
Explanation:
Given data:
Number of moles of FeCl₃ = 6 mol
Number of moles of oxygen = 3 mol
Excess reactant = ?
Solution:
Chemical equation:
4FeCl₃ + 3O₂ → 2Fe₂O₃ + 6Cl₂
Now we will compare the moles of reactant with product.
FeCl₃ : Fe₂O₃
4 : 2
6 : 2/4×6= 3
FeCl₃ : Cl₂
4 : 6
6 : 6/4×6= 9
O₂ : Fe₂O₃
3 : 2
O₂ : Cl₂
3 : 6
Less number of moles of product are formed by the oxygen thus it will act as limiting reactant while FeCl₃ is present in excess.
Answer:
C- a method of testing an idea
Its like weight but not. mass is the amount of matter in a substance.