Divide 158 by 156. The answer is the density in grams per ml. In this case, very close to 1 g/ml Density = MASS divided by VOLUME
About 3/5 cup
156 ml = 5.27 US fluid ounces.
512 GRAMS Divide the quantity by the SG: EG1000 litres divide by 1.28 = 781.25 litres per tonne. dumb*** has to use percent sulfuric acid .4*.391=.1564 *1000=156ml of sulfuric acid 156*1.28=200.2 grams H2SO4 in .4L and is 5.1M