Inorganic Chemistry Answers

Ethanol burns according to the following equation. C2H5OH + 3O2 > 2CO2 +3H2O if 15.0 mole of C2H5OH burns this way, how many moles of oxygen are needed?

3. The Henry’s law constant for H2S is 0.1 mole/L.atm and
H2S <---> HS- + H+
Where Ka = 10-7. The equilibrium pH of the solution is 4.5 if pure H2S gas is dissolved in water. Find the partial pressure of the H2S gas above the solution.

4. At a wastewater treatment plant, FeCl3(s) is added to remove excess phosphate (PO4-3) from the effluent. Assume the following reactions occur:
FeCl3(s) <---> Fe3+ + 3Cl-
FePO4(s) <---> Fe3+ + PO4-3
The Ksp for the second reaction is . What concentration of Fe3+ (in mg/L) is needed to maintain the phosphate concentration below the limit of 1 mg/L P?

Mg2+ + 2(OH-) -> Mg(OH)2

(note that this is a equilibrium reaction so it should have both forward and backward equal signs)

I need to find the concentration of [Mg2+] and [OH-] with the given concentration of [Mg(OH)2] of 1.5 x 10^-12 mol^3l^3

2. Strontium Hydride solid reacts with water to form strontium hydroxide and hydrogen gas:
SrH2(s) + H2O(L)®Sr(OH)2(s) + H2(g)
How many grams of H2Oand SrH2are required to produce 500 grams of Sr(OH)2?Also, find the volume of hydrogen gas that will be produced from the reaction? Assume the condition is at STP.

18. When is an atom unlikely to react and form chemical bonds?

19. What is the order of the types of nuclear radiation from lowest to highest energy?

20. Which statement is false? Rewrite it so that it is true.
a. Fusion involves the combination of two smaller atoms into a larger atom.
b. Fission involves the splitting of an atom into smaller atoms.
c. Fission and fusion are two processes that release very little amounts of energy.

For questions #14 – 17, write an equation for the reaction of magnesium chloride and sodium oxide to produce magnesium oxide with sodium chloride.
14. Show the formulas of the reactants.

15. Show the formulas of the products.

16. Write the balanced the equation for this reaction.

17. What type of chemical reaction is this? How do you know?

For question #13, use the following picture:

13. The picture is a model of a nitrogen atom. What is incorrect about the atomic orbital arrangement of electrons in this model?

(The link of the image is down)

goo.gl/3s9NG6

For question #12, use the following picture:

12. What element is this? How do you know?

(the link of the image is down)

goo.gl/DsMGQs

For questions #8 – 9 use the following pictures:
link of the picture is down :

https://goo.gl/9jL5hv

8. Which picture(s) would best represent atoms in the gas of a neon sign? Explain why.

9. Which picture(s) would best represent a rock? Explain why.

Two examples of inorganic chemistry