Recent content by fridakahlo

Homework Statement Find roots of the EQN: r^3-r^2+1=0 Homework Equations none The Attempt at a Solution r^2(r-1)+1=0 from there i solved, r^2=-1 and r-1=-1 to find the following roots: r=+i,r=-i, r=0 Is my method correct? Also, I don't think that synthetic division would work here since my...

I just looked up the electronegativity difference (Pauling scale) for Carbon and oxygen=0.9 So... this would be a polar covalent bond. However, basic lewis structure rules say that the most electronegative atom should carry the negative formal charge. Right?

Homework Statement Find the lewis structure for [CH3OH2]+ Homework Equations n/a The Attempt at a Solution I found the lewis structure to have a positive formal charge on the oxygen. I'm not sure why the oxygen would have the + f.c. since it is much more electronegative than fairly neutral...

Homework Statement First question on PDF: http://ars-chemia.net/Classes/102/Problem_Sets/Practice%20Exam%20for%20Exam%201%20Key.pdf Homework Equations I used the initial rates method: Rate2/Rate1=k2*[A]^m/k1*[A]^m The Attempt at a Solution When I solve these types of problems with the...

Thank you! (: I just finished reading up on nuclear binding energy, and it has become a lot clearer now.

Homework Statement "You might wonder how six protons and six neutrons, each having a mass larger than 1 u, can be combined with six electrons to form a carbon-12 atom having a mass of exactly 12 u. The bound system of carbon-12 has a lower rest energy than that of six separate protons and six...

Homework Statement Find the volume of the given solid. Bounded by the planes z = x, y = x, x + y = 5 and z = 0 Homework Equations V =...

Homework Statement You are standing approximately 2 m away from a mirror. The mirror has water spots on its surface. True or False: It is possible for you to see the water spots and your image both in focus at the same time. Homework Equations p=object distance q=image distance The Attempt...

Thanks Chestermiller!

Hi! I'm new to the forums, so I apologize in advance if I'm posting my question in the wrong section. I'm studying thermodynamics right now, and I came across this sentence from my book: Homework Statement "When energy is added to a system and there is no change in the kinetic or potential...