6. A solution is prepared by dissolving 171 g of CdCl2 in enough water to make 250,0 mL of solution. If the density of the solution is 1.556 g/mL, A) what is the molarity of the solution B), what is the mass percent of CdCl2 in the solution?

I'm sorry but i'm only grade

Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.

Ithink d hope that