<span>2 Al+6 HBr = 2 AlBr</span>₃ <span>+ 3 H</span>₂
2 moles Al --------- 6 moles HBr ----------- 3 moles H₂
3.22 moles Al ------ 4.96 moles HBr ----- ( moles H₂ )
moles H₂ = 4.96 x 3 / 6
moles H₂ = 14.88 / 6
= 2.48 moles of H₂
hope this helps!
The process of fermentation in winemaking turns grape juice into an alcoholic beverage. During fermentation, yeasts transform sugars present in the juice into ethanol and carbon dioxide (as a by-product).
<u>Answer:</u> Mixture can be separated into its components but impure substance cannot be separated into components.
<u>Explanation:</u>
A mixture is defined as a combination of two or more different substances in which the component substances are individually distinct. The substances can be separated by physical processes. The separation dos not involve any chemical process because no new substance is being formed.
Impure substance is defined as a substance which can be mixture of elements, compounds or elements and compounds. The substances cannot be separated by physical means but can only be separated by chemical means.
Answer:
No, no precipitate is formed.
Explanation:
Hello there!
In this case, since the reaction between ammonium sulfide and aluminum nitrate is:
In such a way, we can calculate the concentration of aluminum and sulfide ions in the solution as shown below, and considering that the final total volume is 140.00 mL:
![[Al^3^+]=\frac{120.00mL*0.0082M}{140.00mL}=0.00703M](https://tex.z-dn.net/?f=%5BAl%5E3%5E%2B%5D%3D%5Cfrac%7B120.00mL%2A0.0082M%7D%7B140.00mL%7D%3D0.00703M)
![[S^2^-]=\frac{20.00mL*0.0090M}{140.00mL}=0.00129M](https://tex.z-dn.net/?f=%5BS%5E2%5E-%5D%3D%5Cfrac%7B20.00mL%2A0.0090M%7D%7B140.00mL%7D%3D0.00129M)
In such a way, we can calculate the precipitation quotient by:
![Q=[Al^3^+]^2[S^2^-]^3=(0.00703)^2(0.00129)^3=1.05x10^{-13}](https://tex.z-dn.net/?f=Q%3D%5BAl%5E3%5E%2B%5D%5E2%5BS%5E2%5E-%5D%5E3%3D%280.00703%29%5E2%280.00129%29%5E3%3D1.05x10%5E%7B-13%7D)
Which is smaller than Ksp and meaning that the precipitation does not occur.
Regards!
