Match the items of Column I with the corresponding items of Column Il. Column 1 1. Building materials, tools and vehicles. 2 Water pipes and electric cables. 3. In coins and catalyst in the manufacture of margarine, 4. Jewelry and plating of teeth. 5. Artificial hip joints, pipes in nuclear power stations. 6. Galvanization of steel. Column 1 a. Copper b. Iron C. Zinc d. Nickel e. Titanium f. Gold g. Silver h. Mercury​

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

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.

Which best explains why an iceberg floats?