Answer:
He developed the concept of concentric electron energy levels
Explanation:
Before Bohr's model, Rutherford's model was proposed. This model explains most of the properties of the atom but failed to explain the stability of the atom.
As per Rutherford's model, electrons revolve around the nucleus in the orbit.
But revolving electron in their orbit around nucleus would give up energy and so gradually move towards the nucleus and therefore, eventually collapse.
Bohr's proposed that the electrons around the nucleus move orbit of fixed energy called "stationary states". Electrons in these stationary states do not radiate energy.
Therefore, proposal of concentric electron energy levels refine the atomic models.
Answer:
4.1 x 10^-4 mol/L
Explanation:
For the equation
FeF2(s) --> Fe2+(aq) + 2F- (aq)
We have that for every mole of FeF2 we have a mole of Fe2+ and 2 moles of F-
FeF2(s) --> Fe2+(aq) + 2F- (aq)
1 1 2
If we have 2.05 x 10^-4 moles of Fe2+
FeF2(s) --> Fe2+(aq) + 2F- (aq)
2.05 x 10^-4 2 x 2.05 x 10^-4
2 x 2.05 X 10^-4 = 5.1 x 10^-4 moles
So if in the solution is measured 2.05 x 10^-4 mol/L of [Fe2+] we have 5.1 x 10^-4 mol/L of [F-]
Answer:
Hard tacos, and tomato, cheese beans burritos are the best
Explanation:
Answer:
Empirical formula has a molar mass of 30.01g/mol and molecular formula is C₆H₁₂O₆
Explanation:
Molar mass of a molecule is the sum of the molar mass of each atom. In CH2O we have:
1C = 1*12.01g/mol = 12.01g/mol
2H = 2*1g/mol = 2g/mol
1O = 1*16g/mol = 16g/mol
Empirical formula of CH2O is:
12.01g/mol + 2g/mol + 16g/mol = 30.01g/mol
As the molecular compound has a molar mass of 180.0g/mol the molecular formula is:
180.0g/mol / 30.01g/mol = 6 times the empirical formula. That is:
<h3>C₆H₁₂O₆</h3>
