Prepare the perchloric acid standard solution by taking 17.0 ml of acid 72% concentrated perchloric acid (kl/kl) mix just enough to make 1000 ml of acetic acid solution
khan. Calculate the number of milliliters of acetic anhydride required to completely react with the amount of water
present in 17 ml of concentrated perchloric acid used. Know the specific gravity of the acid
perchloric acid is 1.60 g/ml and that of acetic anhydride is 1.02

more infor would

a lot

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.