<h3><u>Answer;</u></h3>
160 g
<h3><u>Explanation;</u></h3>
1 mole of a compound contains a mass equivalent to the relative formula mass of that particular compound.
the formula of iron oxide is Fe2O3
R.A.M of Iron = 56 , while that of oxygen is 16
RFM = (56 ×2) + (16 ×3)
= 112 + 48
= 160
Therefore, 1 mole of Iron oxide contains 160 g
Answer:
Ionic or Electrovalent Bond.
Explanation:
its ionic bond because the Halogen atom (F) is getting bigger with electrons. This increases the size of the dipoles which cause van der waals dispersion forces. Hence resulting to increase in the strenght of the bond.
State the problem that you are trying to solve. Make sure that the hypothesis clearly defines the topic and the focus of the experiment.
Answer: 
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.
The electrons are filled according to Afbau's rule in order of increasing energies where orbital with higher value of (n+l) has higher energy as compared to orbital having lower (n+l) value. Thus the electronic configuration for calcium with atomic number of 20 and hence containing 20 electrons is :
0.645L * 0.410 mol KBr / 1 L = mol KBr
