Question

calculate the mass precent of different elements of sodium sodium (Na2 So4) Atomic mass of Na=32 s=32 O=16u​

Answer 1

Molar mass of  $Na_{2}$S$O_{4}$  = 23×2+32+4×16=142

Na =   23 x 2 / 142 × 100 = 32.4%

S = 32 /  142  × 100 = 22.5%

O = 64  / 142  × 100 = 45%

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