1 Cropping an image means to select a rectangular region to use. 2  To crop an image: 3  Right click on the image file in the File Explorer, select Open With, Paint. 4  Right click on the Select item in the toolbar.  Depress the left mouse button at the upper left corner of the rectangular region you wish to select.
TNT is made by adding 3 NO 2 groups (from nitric acid) to toluene. At low temperatures, the mononitrotoluenes are made, and as the reaction temperature is increased the dinitro compounds are formed, until eventually TNT is formed. TNT is explosive for two reasons. First, it contains the elements carbon, oxygen and nitrogen, which means that when the material burns it produces highly stable substances (CO, CO 2 and N 2) with strong bonds, so releasing a great deal of energy.
It is from morphine that heroin is made. Morphine is made into heroin with a chemical reaction containing the chemical compound acetic anhydride. The heroin is then purified using chemical or mechanical means.pium and morphine, from which heroin is made, come from a variety of sources: 1  Afghanistan-leading illegal opium and heroin exporter producing up to 82% of the world's supply. 2  Pakistan, Southeast Asia, South America-other illegal sources.