19) You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best procedure is to weigh out: A) 10.6 g Na2CO3 and add 2.00 L of water to it. B) 21.2 g Na2CO3 and add 2.00 L of water to it. C) 10.6 g Na2CO3 and add water until the final solution has a volume of 2.00 L. (D)21.2 g Na2CO3 and add water until the final solution has a volume of 2.00 L.