4 GC question please help

[ManzRDH]

Hi I purchased these practice test on ebay but there are no explainations but I think I have found some errors. GC isn't my strong point, so any help would be greatly appreciated.



How many grams of CaCl are need to prepare 72 grams of silver chloride according to the following:

CaCl(aq) + 2 AgNO2(aq)------ Ca(No3)2 (aq) + 2 AgCl

a-27 g
b- 28g
c- 29g
d-30 g
e-none of the above




How many moles of H2O are produced in the combustion of 20g of glucose in excess 02?

a-2/3
b-1/3
c-2/6
d 1/6
e none




How many ml of H20 must be added to 65 ml of a 5.5 m solution of NaOH in order to perpare a 1.2 M NaOH solution?

a- 230 ml
b- 235 ml
c- 229 ml
d- 1 L
e- none

FInally:

what is the conc of H+ in a 2.0M solution of acetic acid CH3COOH? Ka+1.8 * 10^5 at 25 degrees C

a- 36* 10^-6
b 6*10^-3
c 3*10^-3
d 36 *10^-3
e- 6*10^-6


Thanks for you help!!

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