Answer:
(i) Calculate the average rate of consumption of A in the first 15 seconds of reaction: -8.67X10^(-3) M/s
(ii) Calculate the average rate of production of C in the first 15 seconds of reaction: 0.0.17 M/s
(iii) Calculate the average rate of consumption of A in the last 15 seconds of the reaction: -3x10^(-3) M/s
(iv) Explain the difference between the rates of consumption calculated in (i) and that in (iii): At the beginning the reaction, is fast, then, when time passes, the reaction slows because there are less concentration of the reactants to produce C, so the rate is less.
Explanation:
The general formula to calculate any reaction rate is:
![r=\frac{\Delta [Concentration]}{\Delta t}](https://tex.z-dn.net/?f=r%3D%5Cfrac%7B%5CDelta%20%5BConcentration%5D%7D%7B%5CDelta%20t%7D)
With this formula we can make the calculations, and we can know if r is positive or negative by knowing if we are calculating for a reactant or a product, positive for products, negative for reactants.
(i)
(ii)
In this case we need to multiply delta by 2, because 1 mole of A produces 2 moles of C:
As we know it is a product, r needs to be positive, so we change the sign of the result and we have: 0.017 M/s
(iii)
(iv)
Is already answered in the upper part.
Answer:
Cesium and Neon
Explanation:
Remember, Neon is a noble gas, also called an inert gas. It does not react really to form compounds. Although chlorine is only one column to the left of neon, it is very reactive and ready forms a salt when combine with sodium. The other elements have similar reactivities to each other. Only Neon is a non-reactive choice.
Answer: Carbon dioxide made of carbon and oxygen.
This is because compounds are the combination of two atoms from different elements (carbon and oxygen). Hope this helps :)
<h2>
Answer:B</h2>
Explanation:
A solution is a homogeneous mixture of two or more substances. A solution may exist in any phase.A solution has two components.The minor component solute is dissolved in a major component called solvent.
Any option that claims against this definition is wrong.
option A:
Since the solution is homogeneous,it has same properties throughout.
option B:
Solutions contain solute dissolved in solvent not solvent dissolved in solute.
option C:
The solution can be in any phase.
option D:
Solutions are a kind of mixtures because they have no chemical interactions among the solute and solvent particles.
So,option B is wrong.
<span>The organizational characteristics of the periodic table of the elements are within a system where all known elements are classified. They are placed from left to right and top to bottom in increasing order of their atomic numbers. The elements are arranged in seven horizontal rows called periods, and in 18 vertical columns called groups or families. Down and to the left increases the atomic radius and the ionic radius. Upwards and to the right increases ionization energy, electron affinity and electronegativity.</span>
