The diagram below shows the wavelengths and frequencies for the various regions of the electromagnetic spectrum.

which of the following is true about the frequencies of electromagnetic radiation?
a. x-rays have lower frequencies than infrared waves.
b.
gamma rays have lower frequencies than ultraviolet waves.
c.
ultraviolet waves have higher frequencies than radio waves.
d.
radio waves have higher frequencies than x-rays.

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.

Non renewable resources like petroleum eventually

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?