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the air and oxygen
Question | Answer |
---|---|
what is the air made up of | 21% oxygen, 78% nitrogen, 1% other gases |
what gas is used up when burning occurs | oxygen |
what substance is used to test for water vapour | anhydrous copper sulfate or colbalt chloride paper |
what color does colbalt chloride paper turn when in the presence of waer | from blue to pink. |
what is oxygen made by in a lab | the decomposing of hyrogen peroxde using magnesium dioide as a catalyst |
what is a catalyst | it speeds up reactions |
name the characteristics of oxygen | colourless, odourless, tastless, gas, slightly solublke in water, supports combustion very well. |
what is the prosses of forming carbonic acid from oxygen | burn carbon in oxygen to form carbon dioxide, then ad water and leave. |
what is hte process of forming magnesium hydroxide from oxygen | burn magnesium in oxygen and add water |
what is oxygen used for? | medicinf, burning, welding, space rockets. |