The answer is option e that is e. Iron and magnesium.
Dark silicates have a specific gravity of 3.2 to 3.6 and are composed primarily of silica tetrahedral and iron and magnesium.
Iron and magnesium is a component of dark silicates that have a specific gravity of 3.2 to 3.6.
So the answer is iron and magnesium.
Answer: explained below
Explanation:
Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed.
Solar energy or energy from the sun is contained in fossil fuels. Hope you found this helpful! Good luck!
Answer:
15.1 seconds is the half life of the reaction when concentration of the substrate is 2.77 M.
Explanation:
A → B + C
The rate law of the reaction will be :
![R=k[A]^x](https://tex.z-dn.net/?f=R%3Dk%5BA%5D%5Ex)
Initial rate of the reaction when concentration of the substrate was 0.4 M:
..[1]
Initial rate of the reaction when concentration of the substrate was 0.8 M:
...[2]
[1] ÷ [2] :
![\frac{0.183 M/s}{0.183 M/s}=\frac{k[0.4 M]^x}{k[0.8 M]^x}](https://tex.z-dn.net/?f=%5Cfrac%7B0.183%20M%2Fs%7D%7B0.183%20M%2Fs%7D%3D%5Cfrac%7Bk%5B0.4%20M%5D%5Ex%7D%7Bk%5B0.8%20M%5D%5Ex%7D)
x = 0
The order of the reaction is zero.
For the value of rate constant ,k:
..[1]
x = 0
![0.183 M/s=k[0.4 M]^0](https://tex.z-dn.net/?f=0.183%20M%2Fs%3Dk%5B0.4%20M%5D%5E0)
k= 0.183 M/s
The half life of the zero order kinetics is given by :
![t_{1/2}=\frac{[A_o]}{2k}](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%3D%5Cfrac%7B%5BA_o%5D%7D%7B2k%7D)
Where:
= Initial concentration of A
k = Rate constant of the reaction
So, the half-life for the decomposition of substrate 1 when the initial concentration of the substrate is 2.77 M:
![t_{1/2}=\frac{2.77 M}{0.183 M/s}=15.1 s](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%3D%5Cfrac%7B2.77%20M%7D%7B0.183%20M%2Fs%7D%3D15.1%20s)
15.1 seconds is the half life of the reaction when concentration of the substrate is 2.77 M.