1. 72.0mL of a 1.50 M solution is diluted to a total volume of258 mL. A 129-mL poriton of that solution is diluted by adding 167mLof water. What is the final concentration? Assume the volumes areadditive? M=?

2.How many grmas of Na2CO3 are present in 21.0 mL. of a solutionthat is 31.0% Na2CO3 by mass. The density of hte solution is 1.12g/mL? g=?

Question

1. 72.0mL of a 1.50 M solution is diluted to a total volume of258 mL. A 129-mL poriton of that solution is diluted by adding 167mLof water. What is the final concentration? Assume the volumes areadditive? M=?

2.How many grmas of Na2CO3 are present in 21.0 mL. of a solutionthat is 31.0% Na2CO3 by mass. The density of hte solution is 1.12g/mL? g=?

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