Beryllium Oxide has a molecular formula Be-O
% covalent character in Be-O = 100 - % ionic character in Be-O
Now,
% ionic character = {1 - exp[(-0.25)(E(Be)-E(O))²]}*100
where,
E(Be) and E(O) are the electronegativity values of Be and O
Based on the Paulings scale:-
E(Be) = 1.57
E(O) = 3.44
% ionic = {1 - exp[(-0.25)(1.57-3.44)²]}*100 = 58.28%
Therefore, % covalent = 100 -58.28 = 41.72%
Ans: b) 41 percent
Answer:
Nervous
Explanation:
Nervous tissue is composed of two main cell types: neurons and glial cells. Neurons transmit nerve messages.
Answer:
No. Two atoms of the same chemical element are typically not identical. Since the states of the electrons in an atom are what determine the nature of the chemical bonding that the atom experiences, two atoms of the same element can react differently if they are in different states.
Answer:
Molecular Mass of insulin = 5004
Explanation:
Mass of insulin = 62.4 g
Volume of the solution = 1.00 L
Osmotic pressure = 0.305 L
Temperature = 25 °C = 25 + 273 = 298 K
PV = nRT
Where,
P = osmotic pressure
V = Volume of the solution
n = No. of moles
R gas constant = 0.08206 L atm K^{-1} Mol^{-1}
T = Temperature
PV = nRT
n = 0.01247
No. of mol = Mass in g/molecular mass
Molecular mass = Mass in g/No. of mol
Molecular mass = 62.4/0.01247
= 5004
C4H9OH is the substrate, Br- is the nucleophile and H2O is the leaving group.
In an SN1 reaction, the rate limiting step is the formation of the carbocation. The carbocation is formed as water which is the leaving group departs. After the leaving group departs, the nucleophile (Br-) attacks to yield the major organic product. The protonation of the -OH group is the first step in the reaction.
It then follows that, C4H9OH is the substrate, Br- is the nucleophile and H2O is the leaving group.
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