Why is the standard enthalpy formation of oxygen zero?

The unsaturated hydrocarbon butadiene (C4H6) dimerizes to 4-vinylcyclohexene (C8H12). When data collected in studies of the kine

UkoKoshka [18]

Answer:

The dimerization of butadiene to 4-vinylcyclohexene folows second order kinetics and its rate law will be given by :

$R=k[C_4H_6]^2$

Explanation:

$2C_4H_6\rightarrow C_8H_{12}$

The rate of the reaction ;

$R=k[C_4H_6]^x$

As given in the question , that graph of time verses $\frac{1}{[C_4H_6]}$ was linear but plots of $[C_4H_6]$ or $\ln[C_4H_6]$ was curved.

Generally:

Graph of time verses $[concentration]$ for zero order reaction is linear with negative slope.

Graph of time verses $\ln [concentration]$ for secon order reaction is linear with negative slope.

Graph of time verses $\frac{1}{[concentration]}$ for secon order reaction is linear with positive slope.

So, the dimerization of butadiene to 4-vinylcyclohexene folows second order kinetics and its rate law will be given by :

$R=k[C_4H_6]^2$

3 0

3 years ago

Iron(III) oxide reacts with carbon monoxide according to the equation: Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g) A reaction mixtur

Svetllana [295]

The answer is B because i just took the test

8 0

3 years ago

Read 2 more answers

Solve for x in the following problem. PV=xRT

Nutka1998 [239]

Solve for x.

pv=xrt

Flip the equation.

rtx=pv

Divide both sides by rt.

rtx.rt = pv/rt

x = pv / rt

6 0

3 years ago

Given the following cations, list them in the expected order from smallest to largest: Y3+, Nb3+, Sb3+

Ugo [173]

Answer: Antimony ion is the smallest and yttrium ion is the largest.

Explanation:

Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

An ion is formed when a neutral atom looses or gains electrons.

When an atom looses electrons, it results in the formation of positive ion known as cation.
When an atom gains electrons, it results in the formation of negative ion known as anion.

As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Hence, the size of an atom decreases.

The size of the cation is small then their neutral atom because it has less number of electrons while its nuclear charge remains the same. Thus, the nucleus attracts the electron more towards itself and leads to the decrease in size.

We are given three cations: $Y^{3+},Nb^{3+}\text{ and }Sb^{3+}$

Yttrium lies in Period 5, group 3 of the periodic table.

Niobium lie in Period 5, group 5 of the periodic table.

Antimony lies in Period 5, group 15 of the periodic table.

So, the order of atomic radii in increasing order follows:

$Sb^{3+}$

Hence, antimony ion is the smallest and yttrium ion is the largest.

6 0

3 years ago

What is the charge of the neutron

elena55 [62]

Answer:

Neutral (no net charge)

Explanation:

Protons - Positive

Electrons - Negative

Neutrons - No charge

Why?

Neutrons are the particle in an atom with a (as the name suggests) neutral charge. They are neither positive nor negative, unlike protons or electrons.

3 0

3 years ago