FINISH THESE QUESTIONS ILL GIVE YOU Write the symbol and name
for the cation formed when Symbol Name

(Example) A calcium atom loses two electrons Ca2+ calcium

A potassium atom loses one electron K+ Potassium ion

A zinc atom loses two electrons Zn2+ Zinc ion
A barium atom loses two electrons

Write the symbol and name for the anion formed when

(Example) A oxygen atom gains two electrons O2- oxide

A fluorine atom gains one electron

A sulfur atom gains two electrons
A nitrogen atom gains three electrons

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 rules of engagement (roe) working group is often used to (select all that apply.)

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?