Angelika Posted February 15, 2007 Share Posted February 15, 2007 I need the molecular formula of oxide of arsenic when it is in its gaseous state and I need to show how I got there. Please help. Link to comment Share on other sites More sharing options...
insane_alien Posted February 16, 2007 Share Posted February 16, 2007 well, start of with the molecular formula of arsenic oxide. <biggest hint in the universe then think about what a gas is. Link to comment Share on other sites More sharing options...
Angelika Posted February 16, 2007 Author Share Posted February 16, 2007 thanks, but I must be really thick as I don't know how to express a gas in a formula. Link to comment Share on other sites More sharing options...
insane_alien Posted February 17, 2007 Share Posted February 17, 2007 okay, no problem. i'll walk you through it. 1. write down the molecular formula for arsenic oxide 2. add on '(g)' 3. move on. the molecular formula of compunds doesn't change when they become a gas. the molecules just get further appart. so the molecular formula will be the same whether its a solid, liquid or gas. the (g) part means 'gaseous' which means its that chemical in gas form. (s) means solid (l) means liquid and (aq) means aqueous (a solution of that compund.) hope this helps Link to comment Share on other sites More sharing options...
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