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A solution of heparin sodium, an anticoagulant for blood, contains 1.8 g of heparin sodium dissolved...

A solution of heparin sodium, an anticoagulant for blood, contains 1.8 g of heparin sodium dissolved to make a final volume of 15 mL of solution. What is the mass/volume percent concentration of this solution?

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The anticoagulant heparin is used for preventing blood clots of patients after surgery, and for the treat- ment and prevention of deep vein thrombosis.
"Sex","Age","Weight","Dose","Heparin" "Male",51,146.94,"High",-1.654 "Male",48,115.08,"High",1.489 "Male",65,83.54,"Low",1.757 "Male",44,94.94,"High",1.324 "Male",43,122.46,"High",-2.86 "Male",54,135.86,"Low",-3.55 "Male",44,116.91,"Low",-1.682 "Male",36,126.98,"High",-0.603 "Male",43,95.9,"High",1.58 "Male",55,127.79,"Low",-1.428 "Male",37,98.58,"High",1.345 "Male",53,121.99,"High",-0.58 "Male",46,74.96,"High",4.47 "Male",53,99.17,"High",0.674 "Male",46,78.35,"High",4.488 "Male",40,122.13,"High",-1.134 "Male",28,81.31,"High",2.617 "Male",37,134.13,"High",-1.895 "Male",39,84.23,"High",2.799 "Male",49,101.35,"Low",0.571 "Male",36,109.39,"Low",-0.41 "Male",48,90.31,"Low",1.116 "Male",40,108.31,"Low",-1.311 "Male",44,117.91,"High",-0.263 "Male",43,97.58,"Low",-1.211 "Male",42,116.8,"Low",-0.174 "Male",37,139.32,"Low",-3.19 "Male",41,108.24,"High",2.052 "Male",35,96.67,"High",0.653 "Male",37,162.38,"Low",-7.441 "Male",45,93.29,"High",1.58 "Male",38,100.41,"High",1.413 "Male",39,81.97,"Low",1.037 "Male",42,89.27,"Low",3.623 "Male",43,89.66,"High",1.49 "Male",40,158.19,"High",-4.324 "Male",37,118.59,"Low",-2.981 "Female",25,77.05,"High",3.94 "Female",38,120.97,"Low",0.666 "Female",42,83.59,"High",5.294 "Female",21,122.16,"Low",1.985 "Female",45,104.93,"High",3.339 "Female",42,70.12,"Low",3.86 "Female",44,92.88,"High",3.422 "Female",46,85.94,"Low",3.293 "Female",43,82.45,"High",4.074 "Female",45,95.56,"High",3.378 "Female",44,86.14,"Low",1.923 "Female",42,82.81,"High",3.494 "Female",51,142.11,"Low",-0.577 "Female",32,87.04,"Low",3.48 "Female",31,82.02,"High",4.136 "Female",59,100.19,"High",4.345 "Female",43,69.19,"High",7.576 "Female",34,106.71,"High",2.712 "Female",42,73.74,"High",3.608 "Female",57,115.93,"High",1.48 "Female",58,59.41,"High",6.555 "Female",43,96.76,"Low",2.277 "Female",39,106.94,"Low",2.377 "Female",43,100.03,"Low",2.377 "Female",35,113.35,"Low",0.049 "Female",39,84.42,"High",5.673 "Female",48,69.54,"Low",5.119 "Female",46,86.53,"High",3.85 "Female",40,123.97,"High",2.478 "Female",46,84.2,"High",2.878 "Female",41,91.71,"High",2.95 "Female",28,84.41,"High",3.88 "Female",45,107.26,"High",2.764 "Female",45,100.1,"High",2.806 "Female",49,80.98,"Low",4.686 "Female",51,94.32,"Low",1.479 "Female",43,91.91,"Low",1.756 "Female",37,91.22,"Low",1.803 "Female",49,68.84,"High",6.17 "Female",53,107.24,"Low",2.13 "Female",38,73.65,"High",4.419 "Female",43,71.33,"Low",3.795...
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