  # bball14

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1. how could you find the pH for a .001 Molar solution of HCl? or what about .050 M of NaOH??
2. how could you find the pH for a .001 Molar solution of HCl? or what about .050 M of NaOH??
3. but that's the question that i'm asking...the vinegar's concentration doesn't change when water is added and i don't know why that is???
4. Why can you add about 20mL of water to about 5 ml of vinegar and it not have any effect on determining the concentrations when doing a titration??
5. HELP ME!! For which of the following equations is the enthalpy change at 25°C and 1 atm equal to DH(HCOOH(l))? a. C(s) + H2(g) + O2(g) HCOOH(l) b. C(s) + 2H(g) + 2O(g) HCOOH(l) c. C(g) + 2H(g) + 2O(g) HCOOH(l) d. CO2(g) + H2(g) HCOOH(l) e. CO(g) + H2O(l) HCOOH(l)
6. When ammonium nitrate undergoes decomposition, only gases are produced, according to the equation NH4NO3 > N2O + 2H2O What is the total volume of gases produced at 546K and 1 atm pressure when 240g of ammonium nitrate undergoes the above decomposition reaction? a) 9 x 22.4L b) 6 x 22.4L c) 12 x 22.4L d) 18 x 22.4L e) 3 x 22.4L I got (a) but I'm not sure if i did it correctly...All I did was I found mols of H20 and mols of N20 which were 6 and 3, respectively. Then I added them to get 9 and picked a. I'm pretty sure this is totally wrong but I was trying to do PV=nRT but I didn't know how.
7. Nevermind, I got it using the mole frations...3mols of N/total mols (6) = Pressure of N/total pressure...Answer is 450...man, i gotta try to read the questions more clearly
8. what is the partial pressure of nitrogen in a container that contains 2 mos of oxygen, 3 mols of nitrogen, and 1 mol of carbon dioxide wehn the total pressure is 900 mmHg?
9. How would I figure out this question? 1. what is the partial pressure of nitrogen in a container that contains 2 mos of oxygen, 3 mols of nitrogen, and 1 mol of carbon dioxide wehn the total pressure is 900 mmHg I want to try and learn how to do the question...so if anyone could help that would be great...THANKS!!
10. thank you so much for helping me out with this problem!!
11. How do you find the radius of a zinc atom using avagadro's number (6.02 x 10>23), the density of zinc (7.13 g/ml), weight of 1 mol of zinc (65.4 g) and using V=4/3 (pie) r (cubed). I don't just need the answer i wanna know how to do a problem like this! THANKS
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