Wednesday
June 19, 2013

# Posts by lou

Total # Posts: 157

math
why is it not -(x-5)(x+5) wouldnt you have to factor out a negative first so the x^2 isnt negative?

math
factor (25-x^2)

Chem
A) Calculate the pH of a buffer system that is 0.06 M HNO2 and 0.160 M NaNO2 B) What is the pH after 2.00 M NaOH are added to 1.00 L of this buffer I can do part A but I don't know how to part B

Chem
So Cu--> Cu2+ +2e- is losing electrons, right? Because its becoming positive

Chem
For this equation 2 Ag+ (aq) + Cu(s) <--> Cu2+ (aq) + 2 Ag(s) Which occurs at the anode? A. Cu --> Cu2+ + 2e– B. Cu2+ + 2e– --> Cu C. Ag+ + e– -->Ag D. Ag --> Ag+ + e– A, right because it's oxidation?

Chemistry
Suppose you had an unknown solution that contained either dissolved NaCL, or NaNO3. You added AgNO3 to the unknown solution and observed that no solid forms. What can be concluded about the unknown solution? (use the solubility rules

Chemistry
Suppose you had an unknown solution that contained either dissolved NaCL, or NaNO3. You added AgNO3 to the unknown solution and observed that no solid forms. What can be concluded about the unknown solution? (use the solubility rules

Chemistry
Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes if a solution that contained dissolved NaF and a solution NaCl. Would you expect a reaction, if Si write the balanced chemical equation

center of mass
3 point mass of 4g placed at x=1,3,-6. where should a point fourth mass of 4 gm be placed to make the center of the mass at the orgin? this what i got : -24+4+12+4x/16=-8+4x/16. this what i did but i didn't get the right answer(which is 2) can someone tell me what is the p...

spanish
i need to give commands to fix the following sentences: 1.El perro tiene hambre 2.hay mucha basura en la cocina 3.los platos,la alformba y el coche estan sucios,yhay polvo en las mesas.

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