GCHEM question!

[blamb]

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Hey I have a question about how to solve a few ghem questions..

1. How many atoms of carbon are in 4.00 x 10 ^-8 grams of C3H8. The answer is 4.00 x10^4...but I keep getting 1.64 x10^ 15

2. If all the chloride in a 5 g sample of an unknown metal chloride is precipitated as AgCl with 70.9 milliliters of .201M AgNO3, what is the precentage of chloride??

3. Increasing atomic size (Be, Na, Mg)

Be < Na < Mg is the right answer but i dotn think its right
isnt it Be < Mg < Na??

Thank you in advance!!!

 

[blamb]

Thank you so much for taking the time to answer the questions! I got 10.1 as well for the second one but the answer is none of the above and 10.1 is an answer choice!! I guess barrons is full of mistakes...

 

[c3p]

Thank you so much for taking the time to answer the questions! I got 10.1 as well for the second one but the answer is none of the above and 10.1 is an answer choice!! I guess barrons is full of mistakes...

if you are using that old 1990 or w/e DAT book it has about a million mistakes in it. to summarize: it sucks.

 

[blamb]

Hey C3p...its the How to prepare for DAT...i bought it before I took the DAT the first time and never used it so I thought i would use it this time around just to see some new questions for practice...it scared me for a sec because i thought I was getting all these wrong!!

 

[c3p]

Hey C3p...its the How to prepare for DAT...i bought it before I took the DAT the first time and never used it so I thought i would use it this time around just to see some new questions for practice...it scared me for a sec because i thought I was getting all these wrong!!

yea it sucks when the book makes mistakes. at least you know ur right now so its all good.