Friday
May 24, 2013

Total # Posts: 271

English
I'm not a native speaker of English so I have grammar problems. What are some ways that I can improve my grammar? Do reading grammar book help? Also, is there any way to improve my writing beside writing more? Thank you

Chem:DrBob
When you write the formula in word equation would it be : Octasilicon and oxygen reacted to produce sulfur trioxide? Would this be the balance equation? S8 + 12O2 -> 8SO3

Chem:DrBob
So since it S3O6, it was reduce to SO3?

Chem:DrBob
Thank you for the informative answer yesterday. I hope you can help me with this one too. Thanks S(subscript 8) + O( subscript 2) -> SO3 Could you explain why it O3 when S valence is -2? Thanks

Chemistry
I'm currently learning about balancing chemical equation but I don't understand the equation below. 2FE + 3CL(subscript 2) -> 2FECL(subscript 3) I understand 2FE balance out but how did 3CL2 became CL3? Thanks

Chemistry
Find the energy( in KJ) of a wave with the wavelength of 507 nm. First, I turn the 507 nm into meter then divide the speed of light by it which give me the frequency. Then I take the frequency and multiply by the planck. Then I would convert the Joule to KiloJoule.- Would this...

Chem:DrBob
Dr.Bob, yesterday you told me : "The best way I think is to show examples. 12Mg = 1s2 2s2 2p6 3s2 Here the 1s orbital is lower than the 2s and they are lower than the 3s etc." 19K = 1s2 2s2 2p6 3s2 3p6 3d0 4s2 Here the 1s is lower than the 2s and those are lower than...

math
A number plus sixteen.

algebra 2
The answer would be (2x+3)(x+1). Do you need an explanation on how to do such problem?

Chemistry
Is this always true, sometime true, or never true? The orbitals of a principal energy level are lower in energy than the orbitals in the next higher principal energy level. -I'm thinking sometime true but I can't figure out how to explain why it sometime true. Thanks

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>