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b)p4 - 124g
c)KBr - 119g
d)H2s - 34g
e)na2so4- 142 g
f)nh3- 17g
g)(nh4)2co3 - 96g
h)mg3(po4)2 - 262g
i)mgo - 40 g
j)NaF - 42 g
k)CaO - 56 g
l)H2SO4 - 98g