Homework Answers
molar mass of Zn(NO3)2=189.4 g/mole
moles of Zn (NO3)2= mass of Zn(NO3)2/ molar mass = 25.38/189.4 =0.134
volume of solution = 500ml, 1L= 1000ml
concentration of solution in liters= 500/1000=0.5L
concentration of Zn(NO3)2= moles of Zn (NO3)2/volume in liters =0.134/0.5= 0.268M ( D is corect answder)
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