Answer
Please see the work below.
Work Step by Step
We know that
a. $Molar \space mass \space of\space CSI=259$
Hence $Mass=0.025\times 259=6.5g$
b. $Molar \space mass\space of H_2SO_4=98 $
$Mass=0.025\times 98=2.44g$
c. $Molar\space mass \space of Na_2CO_3=106$
$Mass=0.025\times 106=2.65g$
d. $Molar \space mass \space of K_2Cr_2O_7=294$
$Mass=0.025\times 294=7.35g$
e. $Molar\space mass \space of KmNO_4=158$
$Mass=0.025\times 158=3.94g$
