Saudi Arabia is preparing for a revolutionary leap in the field of space. The Saudi Press Agency reported that the Saudi Space Commission Authority has started preparations to send a woman into space. This will happen by next year. More...
You put some zinc into the hydrochloric acid in a test tube. The formation of hydrogen gas can be seen. That's the chemistry you know. Zn + HCl → ZnCl2 + H2 In 1766, Henry Cavendish identified this element and...
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