Answer:
0.0000159
Explanation:
Divide 15.9 by 1000000, because 1 kilometer equals 1000000 millimeters.
The scientific method use, and thus going "for, the idea of following the ideal of scientific evidence.
The rate constant : b. 1/ M² · s
<h3>Further explanation </h3>
The reaction rate (v) shows the change in the concentration of the substance (changes in addition to concentrations for reaction products or changes in concentration reduction for reactants) per unit time.
For A + B ---> C + D
Can be formulated:
![\large{\boxed{\boxed{\bold{v~=~k.[A]^a[B]^b}}}](https://tex.z-dn.net/?f=%5Clarge%7B%5Cboxed%7B%5Cboxed%7B%5Cbold%7Bv~%3D~k.%5BA%5D%5Ea%5BB%5D%5Eb%7D%7D%7D)
where
v = reaction speed, M / s
k = constant, mol¹⁻⁽ᵃ⁺ᵇ⁾. L⁽ᵃ⁺ᵇ⁾⁻¹. S⁻¹
a = reaction order to A
b = reaction order to B
[A] = [B] = concentration of substances
Units of the rate constant - k depend on rate law, so it is unique for the specific reaction
So for the rate law :
Δ[C]/ΔT = k[A]²[B] , the units are :
![\tt \dfrac{M}{s}=k\times M^2\times M\\\\k=\dfrac{M/s}{M^2\times M}\\\\k=\dfrac{1}{M^2.s}](https://tex.z-dn.net/?f=%5Ctt%20%5Cdfrac%7BM%7D%7Bs%7D%3Dk%5Ctimes%20M%5E2%5Ctimes%20M%5C%5C%5C%5Ck%3D%5Cdfrac%7BM%2Fs%7D%7BM%5E2%5Ctimes%20M%7D%5C%5C%5C%5Ck%3D%5Cdfrac%7B1%7D%7BM%5E2.s%7D)
Answer: <span>C) plasma
</span><span>
Natural phenomena characterized by colored lights in the sky, is caused by the interaction of charged particles of energy from the solar wind with the magnetic layer of the earth so we have turbulence and multicolored plasma clouds known as auroras arise.</span>
Answer: (a) The products are
and AgCl. The balanced equation is
.
(b) The type of reaction is double displacement reaction.
Explanation:
(a) The complete reaction equation will be as follows.
![BeCl_{2}(aq) + 2AgNO_{3}(aq) \rightarrow Be(NO_{3})_{2}(aq) + 2AgCl(s)](https://tex.z-dn.net/?f=BeCl_%7B2%7D%28aq%29%20%2B%202AgNO_%7B3%7D%28aq%29%20%5Crightarrow%20Be%28NO_%7B3%7D%29_%7B2%7D%28aq%29%20%2B%202AgCl%28s%29)
Number of atoms on reactant side are as follows.
- Be = 1
- Cl = 2
- Ag = 2
= 2
Number of atoms present on product side are as follows.
- Be = 1
- Cl = 2
- Ag = 2
= 2
Here, number of atoms on both reactant and product side are the same. Hence, it is a balanced chemical equation.
(b) A reaction in which two reactant species tend to change their ions with each other and form new compounds. This type of reaction is called double displacement reaction.
As the given reaction is as follows.
![BeCl_{2}(aq) + 2AgNO_{3}(aq) \rightarrow Be(NO_{3})_{2}(aq) + 2AgCl(s)](https://tex.z-dn.net/?f=BeCl_%7B2%7D%28aq%29%20%2B%202AgNO_%7B3%7D%28aq%29%20%5Crightarrow%20Be%28NO_%7B3%7D%29_%7B2%7D%28aq%29%20%2B%202AgCl%28s%29)
This shows that ions are being exchanges by the reactants
and
. The ions are
,
,
and
.
Therefore, this reaction is a double displacement reaction.