Question

How many So3^2- ions are contained in 99.6 mg of Na2SO3? the molae mass of Na2SO3 is 126.05 g/mol.

Answer 1

1 Mass of Naz soz is 99.6 ing = 99.68103 g Modar mass of Na, Sog = 126.05 g/mol. So, 99.6x103 g of Na so = ( 99.6x103 mol of Nasag ( 126.05 ) = 7.90168104 mol of Na Soz We know that one mol of Na so = 6:022x10 no of Ny so mnou molecules

23 Hence, 7.90168107 mol of Na, so = (61022x10 X 0 7.9016810 no. of malecules of Na sog 20 2- So, 7.90168104 mol = 4.758 x 10 no of Naso. of Na, Soz molecule 4.758x18 no. of Nay Sog molecule is present in aqibing of Naso. Naz Soz 2 Na + som From one molecule of Naz Sogn one sog i on is produced. 2- So, total no. of son ion = Total no. of Na, sog molecules Hence, No. of son ion is 4.7588120 tence, 20 10