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15 July, 05:50

What is the percent by mass of sodium in Na2SO4

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  1. 15 July, 06:34
    0
    The gram formula mass of Na2SO4 is 23*2+32+16*4=142. And the mass for sodium is 23*2=46. So the percent by mass is 46/142*100%=32.4%.
  2. 15 July, 06:59
    0
    32•4 is the simplest answer
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