Search found 7 matches

by Rachel Ma
Wed Nov 30, 2016 10:02 pm
Forum: DeBroglie Equation
Topic: questions on final about DeBroglie Equation
Replies: 1
Views: 316

questions on final about DeBroglie Equation

for answers in the final, we are often told to find the wavelength of an atom, the compare it to its diameter and the question asks " Does it make sense?" the answer is always that "since the wavelength is less than size (diameter), yes it makes sense." May someone please explain...
by Rachel Ma
Sun Nov 27, 2016 3:02 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: electron withdrawing ability
Replies: 1
Views: 336

electron withdrawing ability

final 2013 question 7b

in acids ch3cooh and c(ch3)3cooh, why does h has higher electron withdrawing ability than ch3? ( hence ch3cooh is a stronger acid than c(ch3)4cooh )
by Rachel Ma
Wed Nov 16, 2016 11:04 pm
Forum: Naming
Topic: What's the formula for this coordination compound?
Replies: 2
Views: 1175

Re: What's the formula for this coordination compound?

yes I agree because you have 2 Br which is -1 charge each, and a sulfate with a -2 charge. In total you have -4 charges and if Cr were to have a +3 charge, the whole ion would have -1 charge.
by Rachel Ma
Tue Nov 08, 2016 5:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011634

Re: Post All Chemistry Jokes Here

Atom: These protons make my mass look big! ;)
by Rachel Ma
Mon Oct 17, 2016 9:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011634

Re: Post All Chemistry Jokes Here

Why are chemists great for solving problems?

They have all the solutions!
by Rachel Ma
Sun Oct 09, 2016 10:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011634

Re: Post All Chemistry Jokes Here

There is no not-trying in Chemistry. Why?

Chem-is-try!
by Rachel Ma
Sun Oct 02, 2016 11:43 pm
Forum: Student Social/Study Group
Topic: CHEM JOKES
Replies: 29
Views: 3480

Re: CHEM JOKES

What do scientists do with dead bodies? They barium.

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