What is the maximum amount (in grams) of ca(no3)2 that can be released into a tank containing 1 l of water containing na2co3 at an analytical concentration of 2.41 x 10 ^-3 m and with a buffered ph of 6.7 without precipitating calcium carbonate (caco3) in any of its allotropic forms: calcite (kps = 2.58 x 10 ^-9) or aragonite (kps = 9.9 x 10 ^-9)?

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Turbo the snail moves across the ground at a pace of 12 feet per day. if the garden is 48 feet away, how many days will it take for the snail to get there?

Ineed ! i have no clue how to do this problem.