Describe what each component of the Currents Tank Investigation represents. In the Currents Tank Investigation,

a. the water represents

b. the sides of the tank represent

c. blowing through the straw represents

d. the moving pepper helps illustrate the movement of

1. currents
2.prevailing winds
3.the ocean
4.continents

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

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.

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?