01:17 15 Lee, Corisha For Tesi 2020 / 37
What is the net force on the box?
3N
5N
O A 5 N to the --
OB. 2 N to the
0 C. 8 N to the
D. 2 N to the
OF SN
O E. 3 N to the
H. 3 N to the
O G. 5 N to the
o 18 N to the

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.

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Air can be considered a mixture. which statement does not explain why?