when iron and oxygen the reactin form Fe2O3 balance equation for this is <span>4Fe + 3O2---> 2Fe2O3
9moles of O2 are needed to produce 6mol of Fe2O3 since the ratio of oxygen to iron(II)oxide is 3:2
hope its help</span>
The answer is light years
Answer:
E. Brønsted-Lowry and Lewis bases.
Explanation:
An Arrhenius base is a molecule that when dissolved in water will break down to yield an OH- or hydroxide in solution.
Bronsted-Lowry base refers to any atom or ion capable of accepting or bonding to a free proton in solution.
Lewis Base is an electron pair donor. Also, it is a molecule that attacks another atom with its eldctron is an electron pair donor and a Lewis Base.
So according to the Lewis acid-base concept, amines can donate an electron pair, so they are Lewis bases. Also, Brønsted-Lowry bases can accept a proton to form substituted ammonium ions. So, amines are bases according to both the Lewis and the Brønsted-Lowry base.
Answer:
- Absorbance of sample solution = 1.21
- Absorbance of reagent blank = 0.205
Explanation:
In order to solve this problem we need to keep in mind the <em>Lambert-Beer law</em>, which states:
Where ε is the molar absorption coefficient, b is the length of the cuvette, and C is the concentration.
By looking at the equation above we can see that if ε and C are constant; and b is 5 times higher (5.00 cm vs 1.00 cm) then the absorbance will be 5 times higher as well:
- Absorbance of sample solution = 0.242 * 5 = 1.21
- Absorbance of reagent blank = 0.041 * 5 = 0.205
Answer:
F (3.98)> O (3.44)> Cl (3.16)> N (3.04)> Kr (3.00)> Br (2.96)> I (2.66)> Xe (2.6)> S(2.58)
Explanation:
Electronegativity is described as the tendency or ability of an element to attract electron density or bond pair of electrons towards itself. It is a chemical property of an element.
In the periodic table, the least electronegative element is caesium (0.79) and the most electronegative element is fluorine (3.98).
List of 9 most electronegative elements are:
F (3.98)> O (3.44)> Cl (3.16)> N (3.04)> Kr (3.00)> Br (2.96)> I (2.66)> Xe (2.6)> S(2.58).