1.

Number of molecules present in 8g of KNO3 is

Answer»

Mass of KNO3 = 39+14+16*4=35+64=98 G
molecules in 98 g kno3= 6.022*10^23
8g =8/98 moles kno3
no. of molecules= 6.022*10^23 * 8/98 = 4.91*10^22


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