<p>It says in my prep book:</p>
<p>“Because of this ease of decomposition, nitric acid is a good oxidizing agent”</p>
<p>How can the ability to decompose determine if nitric acid is a good oxidizing agent?</p>
<p>Another question:</p>
<p><a href=“http://0.tqn.com/d/chemistry/1/0/l/M/1/pentane.jpg[/url]”>http://0.tqn.com/d/chemistry/1/0/l/M/1/pentane.jpg</a></p>
![http://0.tqn.com/d/chemistry/1/0/l/M/1/pentane.jpg[/url]](http://0.tqn.com/d/chemistry/1/0/l/M/1/pentane.jpg%5B/url%5D){kind=link}
<p>The question is:
What is the molecular formula for this hydrocarbon?
(a) C5H6
(b) C5H9
(c) C5H10
(d) C5H12</p>
<p>If I don’t know the name of the compound, how will I know what are in the empty gaps? How many hydrogen atoms will be in total?</p>
<p>Wow I’m taking in Nov and this is all Chinese to me o.O
What book are u studying from?!</p>
<p>Barron’s.</p>
<p>Could someone please answer the questions…</p>
<p>Here’s another one:</p>
<p>H2S + NO3-+ H+ → S + NO + H2O </p>
<p>How do I know if this solution is acidic or basic?</p>
<p>2200andbeyondXD: Chinese ain’t difficult. Are you insinuating that chem is piece of cake for you. ;)</p>
<p>Ccuser001; the option is d. C5H12</p>
<p>All the ends/pointed corner of the line represent carbon atom with two hydrogen atom bonded, making the total number of carbon 5 and hydrogen 12.</p>
<p>And replying to the first query, all oxidising agents get reduced or they lose oxygen atom. So nitric acid easily decomposes meaning oxygen atom is easily removed, thus, making it a good oxidising agent. 
hope it helps. But sorry, don’t know the lat question. Do you mean the reaction or which solution are you referring to?</p>
<p>@Savvy123 </p>
<p>How did you know that the corners represent CH2? </p>
<p>For the other question, I’m referring to the aqueous solution in which the reaction takes place. To be honest, I’m not sure. It’s just that to do the Ion-electron method of balancing redox reactions, you need to know if the solution is acidic or basic. Now in that equation, how would I know?</p>
<p>I saw somewhere that All positive ions give acidic solutions, so would it be correct to say, that since we have positive ion H+, the solution is acidic?</p>
<p>If two elements (same group) have similar chemical properties because they have the same number of electrons, why don’t: O2- and Ne have similar chemical properties?</p>
<p>No I’m implying that it is EXTREMELY New to me! I’m studying from PR
Which lessons are the questions from… like related to which chapter?</p>
<p>They’re random; some are from redox equations, others from nomenclature.</p>
<p>Here’s a question:</p>
<p>C2H4 + 3O2 → 2CO2 + 2H20
When 100 grams of O2 are allowed to react completely with 1 mol of C2H4 according to the equation above, which of the following results?
A. Some C2H4 remains unreacted.
B. Some O2 remains unreacted.
C. Only CO2 and H2O are present when the reaction has run to completion.
D. Less than 2 moles of CO2 is formed.
E. The partial pressure of O2 falls to zero.</p>
<p>It says the answer is B; I get that O2 is the limiting reactant, so how could some of it be left unreacted?</p>
<p>What would happen if I added helium gas to this reaction:</p>
<p>H2 (g) + I2 (g) + 51.9 kJ → 2HI (g)</p>
<p>I thought at first that adding concentration to the reactants will shift the equilibrium to the right, so it would increase the rate of the forward reaction. But apparently that’s wrong.</p>
<p>[View</a> image: concentrationgraph](<a href=“http://postimg.org/image/dca2jic73/]View”>http://postimg.org/image/dca2jic73/)</p>
<p>To increase pressure, the reaction has to shift to the side with more molecules, which is the reactant side. Increasing the concentration of the reactant side and simultaneously decreasing the product side is what’s happening in the graph. I was stuck between A and E. What’s the correct explanation?</p>
<p>Btw, if someone doesn’t answer soon, this is going to become a very looooong thread. :P</p>
<p>A drying agent is not suitable for removing the water vapor from a sample of gas with which the drying agent reacts chemically. Which of the following gases can be properly dried by means of NaOH?
A. CO2
B. SO2
C. HBr
D. O2
E. HCl </p>
<p>Answer’s D, but I don’t understand why.</p>
<p>So, I made this question; it’s based on another question I saw:</p>
<p>Calculate the hydrogen ion concentration of 0.001M of NaHCO3.</p>
<p>Are you taking a class, or are you self-studying?</p>
<p>
</p>
<p>The other four will react with the NaOH.</p>
<p>
The ethene is the limiting reactant, not the oxygen.</p>
<p>
</p>
<p>Why don’t you try to solve it first?</p>