We know that C has a formal charge of +4 while each O element
has a formal charge of -2, therefore the formal charge of X is:
X + 2 – 2 * 3 = 0
X + 2 – 6 = 0
X = 4
<span>So X has a group number of 4.</span>
Answer:
Alkenes are those organic compound which have double carbon bond
Formula of but-2-ene = C4H8
Since no choices are given, I will describe the reactivity of the element chlorine. A halogen is example of
nonmetal. When compounds containing halogens they are
called salts thus the name “salt – former”. Halogen consists of Fluorine,
Chlorine, Bromine, Iodine, Astatine. An example of is reactivity is the monochlorination of
an alkane, which involves substituting one of the hydrogen atom in the alkane and
exchange it with a chlorine atom.
CH₄ + Cl₂ → CH₃Cl + HCl
The H in methane is substituted with the
Cl in chloride.
Step first:
Since, 78.0 percent 
by volume is present in the air which implies there are 78 moles of present in 100 moles of air.
Now,
Mole fraction of = 
Mole fraction =
= 0.78
Partial pressure is equal to the multiplication of total pressure and mole fraction.
Partial pressure = 
(as 1 atm is atmospheric pressure)
= 0.78 atm.
Step second:
Henry's law constant is calculated by:
where,
is solubility of gas
is partial pressure of gas
is henry's law constant
Substitute the value of solubility and partial pressure to find the value of Henry's law constant in above formula:
k = 
= 
Thus, Henry's Law constant is 
.
