please show working thank you 47/ of the following, a 0.10M aqueous solution of
ID: 882205 • Letter: P
Question
please show working thank you
47/ of the following, a 0.10M aqueous solution of __________ will have the highest boiling point.
A/ NACL
B/ AL(NO3)3
C/ K2CrO4
D/ Na2SO4
48/ Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction:
2NO2 -----> 2NO + O2
In a particular experiment at 300 celcius , [NO2] drops form 0.0100 M to 0.00650 M in 100 seconds. The rate of appearance of O2 for this period is _________ M/s.
A/ 1.8 x 10^-5
B/ 3.5 x 10^-5
C/ 7 x 10^-5
D/ 3.5 x 10^-3
E/ 7 x 10^-3
Explanation / Answer
47) B/ AL(NO3)3 it produces 4 ions more the number of ions higher the boiling point . in remaining ions less number ions will produce.
48) 2NO2 -----> 2NO + O2
NO2 decomposes 2xs as fast as O2 is produced
so (0.0100 - 0.00650 M)/100s= (3.5E-5 M/s) /2= 1.8 x10^-5
choice A
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