Chemistry

Half reactions for chemistry? I just dont get them :/

What are the half reactions for the following redox reactions? 1) N2(g)+3F2(g)->2NF3(g) 2) 2Fe2O3(s)+3S(s)->4Fe(s)+3SO2(g)-N2---->2N +6e oxidation 3F2 +6e-----> 6F-1reduction These are now balanced

Can Someone Do This Example Please, Bases and Acids

I dont understand how to solve these types of questions. What mass of sucrose, C12H24O11, is needed to make 500 mL of a 0.20 M solution? Break down step by step please. Thanks in advance!-molecular

Chem questions (State of matter calculations)

Im getting lost on these 2 questions, so help would be greatly appreciated.Question #1 is worth 3 pts, question #2 is worth 5 pts. 1) The temperature of 12 L of gas is raised from 25 to 50 degrees C,

Chem 11 Lab question major needing of help ....

I did half of the work sheet but there are just some questions that I dont understand and would really love your help on!! here they are: Suppose you wanted to add just enough 0.40M calcium chloride

How can I determine which substance has the lowest boiling point

I want a general list of things I can check/determine in order to be able to tell. Im trying to do some homework, and I could have put the exact compounds Im looking at, but I dont want a one-time ans

I have two really hard questions! I'll give 10 points to the first right answer!

1.] The body of scientific knowledge is strengthened by A. being examined by new investigations and scientific argumentation. B. the media sharing scientific findings with the general public. C. new

Example from real life where you would want to use a logarithmic equation

forensics uses newtons law of cooling to determine when a victim died. T = temperature t = time Rt = room temperature To = initial temp. k = rate of cooling. the equation is T = (To - Rt)e^kt + Rt

Help with balancing an equation?!

_Na3PO4 X(multiplied) 12H20 + _Zn(C2H3O2)2 X 2H20 --> _Zn3(PO4)2 X 4H20 + _NaC2H3O2 + _H2O who can balance this? i know how to balance but this one is so hard. any help would be appreciated! thanks!!

If 50 mL of HCl solution requires 20 mL of 0.20M NaOH to titrate, what is the concentration of HCl solution?!

If 5 0 mL of a HCl solution requires 20 mL of 0.20M NaOH to titrate it to the equivalence point, what is the concentration, in moles per liter, of the HCl solution?-VxN(HCl)=VxN (NaOH) 5ox N=20x.2N= .

Chemistry TRUE statement.

Which of the following statements is not true regarding bases? a.Ammonia (NH3) and Pyridine (C5H5N) are weak bases. b.Bases have a pH greater than 7. c.Strong bases undergo strong endothermic reactio

Calculate the hydrogen ion concentration for a solution with a 12.75 pH

Calculate the hydrogen ion concentration, in moles per liter, for a solution with 12.75 pH. Also, tell whether it is basic, acidic, or neutral.-pH = -log[H+] Hence [H+] = 10^-pH =10^-12.75 = 1.78 x 10

Write a chemical equation that shows how NH4+ behaves as an acid when dissolved in water

NH4+ + H2O = NH3 + H3O+ because NH4+ is giving a proton to H2O it acts as an acid-NH4+ + H2O = NH3 + H3O+

Rate of reaction!! please help me

http://www.xtremepapers.me/IB/Chemistry/Higher/2008%20May/Chemistry%20HL%20paper%202%20TZ2.pdf when you open the link there is a question 1. i am so confused about how to get the initial rate of rea

When 7.08 grams of CaO(s) is completely dissolved by HBr(aq), how many grams of CaBr2 are formed in solution

when 7.08 grams of CaO(s) is completely dissolcved by HBr(aq), how many grams of CaBr2 are formed in solution?-CaO + 2HBr --> CaBr2 + H2O 7.08g CaO / 56g/mole = 0.126moles 1:1 ratio of CaO:CaBr2 0.12

Determine the pH in each of the following solutions then classify it as acidic, basic, or neutral:: pOH=10.5,

Determine the pH in each of the following solutions then classify it as acidic, basic, or neutral:: pOH=10.5, pOH=6.5,pOH=.65,pOH=9.78-pOH + pH = 14 if pOH > 7, the pH pOH = 10.5, pH = 3.5 acid pOH