2. The successive ionization energies in kJ/mol of an element were found to be: 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 1000 2,250 3,360 4,560 7,00 8,500 27,000 32,000 37,000 43,000 To what family does this element belong? A. Alkali metals b. Alkali Earth metals c. Boron family d. Carbon family e. Nitrogen f. Oxygen family g. Halogens h. Noble Gases

Solar energy is energy from the sun that is converted into thermal or energy. a. nuclear b. mechanical c. electrical d. chemical

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.

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.