Which statement correctly compares radio waves and electromagnetic waves? a. radio waves have longer wavelengths and higher frequencies than microwaves. b. radio waves have shorter wavelengths and higher frequencies than microwaves. c. radio waves have longer wavelengths and lower frequencies than microwaves. d. radio waves have shorter wavelengths and higher frequencies than microwaves.

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.

How many atoms are there in 5.70 mol of mg

What must be in balance for temperatures to remain constant?