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ข้อคิดเห็นที่
1: 1 % ( by weight ) = 1 in 100 = 10,000 in 1,000,000 = 10,000 ppm Sodium metabisulfite __ Na2S2O5 __ 190.107 g / mole Sulfur __ S __ Atomic Weight 32.064 Solution of 1 % Na2S2O5 contains 10,000 ppm of Na2S2O5 and contains [ 10,000 ppm x ( 2 x 32.064 ) / ( 190.107 ) ] of Sulfur = 5,878 ppm of Sulfur โดย: ฤทธิ์เค็มเมียว [27 พ.ย. 2561 11:42] |