Total # Posts: 7
Write an equation (chemical or ionic) and use oxidation numbers to find out what is being oxidized and what is being reduced. (a) aluminum + oxygen (b) magnesium + steam (c) iron + dilute hydrochloric (d) copper(ii) oxide + carbon (e) bromine + potassium iodide solution
June 30, 2011
Chemistry! I need help quick! Thank you very much!
2h2O2 + 2H2O ---> 2H2O + O2 If 50cmcube , 2.0 mole/dmcube of hydrogen peroxide is decomposed and volume of oxygen gas collected. How much hydrogen peroxide is decomposed?
June 19, 2011
Math algebra (urgent!) help me! Thanks a lot!! (;
Mr lol bought x oranges for $30 and sold them at a profit of 5cents per orange. Write down the (i)cost price of an orange. (ii)the selling price of an orange When he had sold all except 20 of the oranges, he found he had received $28. (iii) form an equation in x and show that ...
June 18, 2011